San Marino, officially the Republic of San Marino (ⁱ/sæn məˈriːnoʊ/ san-mə-REE-noh; Italian: Repubblica di San Marino) and also known as the Most Serene Republic of San Marino (Italian: Serenissima Repubblica di San Marino), is a state situated on the Italian Peninsula on the eastern side of the Apennine Mountains. It is an enclave surrounded by Italy. Its size is just over 61 km² (24 sq mi) with an estimated population of over 30,000. Its capital is the City of San Marino. San Marino has the smallest population of all the members of the Council of Europe.

San Marino is the oldest surviving sovereign state and constitutional republic in the world, as the continuation of the monastic community founded on 3 September 301, by stonecutter Marinus of Rab. Legend has it that Marinus left Rab, then the Roman colony of Arba, in 257 when the future emperor, Diocletian, issued a decree calling for the reconstruction of the city walls of Rimini, which had been destroyed by Liburnian pirates.

The constitution of San Marino, enacted in 1600, is the world's oldest constitution still in effect. The country's economy mainly relies on finance, industry, services and tourism. It is one of the wealthiest countries in the world in terms of GDP (per capita), with a figure comparable to some of the more developed Italian regions, such as Lombardy and Trentino-Alto Adige/Südtirol. San Marino is considered to have a highly stable economy, with one of the lowest unemployment rates in Europe, no national debt and a budget surplus.

Valentina Monetta (born 1 March 1975, City of San Marino) is a Sammarinese singer.

On 14 March 2012, it was announced by San Marino RTV, that she would represent San Marino in the Eurovision Song Contest 2012, to be held in Baku, Azerbaijan with the entry "Facebook Uh, Oh, Oh". She was internally selected by RTV. However on March 18, 2012, a few days after the song was announced, the EBU deemed that the song contained an unreasonable commercial message for Facebook, which resulted in the lyrics' disqualification; according to the Eurovision Rule 1.2.2.g, commercial messages within songs are not allowed. San Marino was then given the option of submitting a new song for Monetta, or revising the lyrics to remove any references to Facebook, no later than 23 March 2012 12:00 CET.On March 22, SMTV announced that the song and its lyrics has been revised with a new title, "The Social Network Song (OH OH – Uh - OH OH)", with mostly the same lyrics, except without directly mentioning Facebook.

Monetta performed at the first semi-final but failed to qualify for the final.