Peter III (21 February 1728 – 17 July [O.S. 6 July] 1762) (Russian: Пётр III Фëдорович, Pyotr III Fyodorovich) was Emperor of Russia for six months in 1762. He was very pro-Prussian, which made him an unpopular leader. He was supposedly assassinated as a result of a conspiracy led by his wife, who succeeded him to the throne as Catherine II.

Peter was born in Kiel, in the duchy of Holstein-Gottorp. His parents were Charles Frederick, Duke of Holstein-Gottorp (nephew of Charles XII of Sweden), and Anna Petrovna, a daughter of Emperor Peter I and Empress Catherine I of Russia. His mother died less than two weeks after his birth. In 1739, Peter's father died, and he became Duke of Holstein-Gottorp as Charles Peter Ulrich (German: Karl Peter Ulrich).

When his aunt, Anna's younger sister Elizabeth, became Empress of Russia she brought Peter from Germany to Russia and proclaimed him her heir-presumptive in the autumn of 1742. Previously in 1742, the 14-year-old Peter was proclaimed King of Finland during the Russo-Swedish War (1741–1743), when Russian troops held Finland. This proclamation was based on his succession rights to territories held by his childless granduncle, the late Charles XII of Sweden who also had been Grand Duke of Finland. About the same time, in October 1742, he was chosen by the Swedish parliament to become heir-presumptive to the Swedish throne. However, the Swedish parliament was unaware of the fact that he had also been proclaimed heir-presumptive to the throne of Russia, and when their envoy arrived in Saint Petersburg in November, it was too late. It has been reported that the underage Peter's succession rights to Sweden were renounced on his behalf.

Russia ⁱ/ˈrʌʃə/ or /ˈrʊʃə/ (Russian: Россия, tr. Rossiya; IPA: [rɐˈsʲijə] ( listen)), also officially known as the Russian Federation (Russian: Российская Федерация, tr. Rossiyskaya Federatsiya; IPA: [rɐˈsʲijskəjə fʲɪdʲɪˈratsɨjə] ( listen)), is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects. From northwest to southeast, Russia shares borders with Norway, Finland, Estonia, Latvia, Lithuania and Poland (both via Kaliningrad Oblast), Belarus, Ukraine, Georgia, Azerbaijan, Kazakhstan, China, Mongolia, and North Korea. It also has maritime borders with Japan by the Sea of Okhotsk, and the US state of Alaska by the Bering Strait. At 17,075,400 square kilometres (6,592,800 sq mi), Russia is the largest country in the world, covering more than one eighth of the Earth's inhabited land area. Russia is also the eighth most populous nation with 143 million people. It extends across the whole of northern Asia and 40% of Europe, spanning nine time zones and incorporating a wide range of environments and landforms. Russia has the world's largest reserves of mineral and energy resources and is the largest producer of oil and natural gas globally. Russia has the world's largest forest reserves and its lakes contain approximately one-quarter of the world's fresh water.

Catherine II, also known as Catherine the Great (Russian: Екатерина II Великая, Yekaterina II Velikaya; German: Katharina die Große), Empress of Russia (2 May [O.S. 21 April] 1729 – 17 November [O.S. 6 November] 1796), was the most renowned and the longest-ruling female leader of Russia, reigning from 9 July [O.S. 28 June] 1762 until her death at the age of 67. She was born in Stettin, Pomerania, Prussia as Sophie Friederike Auguste von Anhalt-Zerbst-Dornburg, and came to power following a coup d'état and the assassination of her husband, Peter III, at the end of the Seven Years' War. Russia was revitalised under her reign, growing larger and stronger than ever and becoming recognised as one of the great powers of Europe.

In both her accession to power and in rule of her empire, Catherine often relied on her noble favourites, most notably Grigory Orlov and Grigory Potemkin. Assisted by highly successful generals such as Pyotr Rumyantsev and Alexander Suvorov, and admirals such as Fyodor Ushakov, she governed at a time when the Russian Empire was expanding rapidly by conquest and diplomacy. In the south, the Crimean Khanate was crushed following victories over the Ottoman Empire in the Russo-Turkish wars, and Russia colonised the vast territories of Novorossiya along the coasts of the Black and Azov Seas. In the west, the Polish-Lithuanian Commonwealth, ruled by Catherine's former lover, king Stanisław August Poniatowski, was eventually partitioned, with the Russian Empire gaining the largest share. In the east, Russia started to colonise Alaska, establishing Russian America.

Stefani Joanne Angelina Germanotta (/ˈstɛfəniː dʒʌrməˈnɑːtə/ STE-fə-nee jurr-mə-NAH-tə; born March 28, 1986), known by her stage name Lady Gaga, is an American singer and songwriter. Born and raised in New York City, she primarily studied at the Convent of the Sacred Heart and briefly attended New York University's Tisch School of the Arts before withdrawing to focus on her musical career. She began performing in the rock music scene of Manhattan's Lower East Side, and was signed with Streamline Records by the end of 2007. During her employment as a songwriter for the record company, her vocal abilities captured the attention of recording artist Akon, who signed her to his label Kon Live Distribution.

Lady Gaga came to prominence as a recording artist following the release of her debut album The Fame (2008), which was a critical and commercial success that topped charts around the world and included the international number-one singles "Just Dance" and "Poker Face". After embarking on the The Fame Ball Tour, she followed the album with The Fame Monster (2009), which spawned the worldwide hit singles "Bad Romance", "Telephone" and "Alejandro". The album's success allowed her to embark on the eighteen-month long Monster Ball Tour, which later became one of the highest-grossing concert tours of all time. Her most recent album Born This Way (2011) topped the charts of most major markets and generated more international chart-topping singles, including "Born This Way", "Judas" and "The Edge of Glory". Besides her musical career, she involves herself with humanitarian causes and LGBT activism.

Peter the Great, Peter I or Pyotr Alexeyevich Romanov (Russian: Пётр Алексе́евич Рома́нов, Пётр I, Pyotr I, or Пётр Вели́кий, Pyotr Velikiy) (9 June [O.S. 30 May] 1672 – 8 February [O.S. 28 January] 1725) ruled the Tsardom of Russia and later the Russian Empire from 7 May [O.S. 27 April] 1682 until his death, jointly ruling before 1696 with his half-brother. In numerous successful wars he expanded the Tsardom into a huge empire that became a major European power. According to historian James Cracraft, he led a cultural revolution that replaced the traditionalist and medieval social and political system with a modern, scientific, Europe-oriented, and rationalist system.