500 can refer to a variety of things, such as:

Justin Randall Timberlake (born January 31, 1981) is an American singer, actor, and businessman. He achieved early fame when he appeared as a contestant on Star Search, and went on to star in the Disney Channel television series The New Mickey Mouse Club, where he met future bandmate JC Chasez. Timberlake became famous in the late 1990s as the lead singer and youngest member of the boy band 'N Sync, whose launch was financed by Lou Pearlman.

In 2002, he released his debut solo album, Justified, which sold more than seven million copies worldwide. The album was a commercial success, spawning the hits "Cry Me a River" and "Rock Your Body". Timberlake continued his success with his second solo album, FutureSex/LoveSounds (2006), debuting at number one on the Billboard 200 chart, and produced the US number-one hit singles "SexyBack", "My Love", and "What Goes Around... Comes Around".

Timberlake has won six Grammy Awards and four Emmy Awards. His first two albums made him one of the most commercially successful singers in the world, each selling in excess of 7 million copies. He also has an acting career, having starred in films such as The Social Network, Bad Teacher and Friends with Benefits. His other ventures include record label Tennman Records, fashion label William Rast, and the restaurants Destino and Southern Hospitality.

Carey Hannah Mulligan (born 28 May 1985) is an English actress. She made her film debut as Kitty Bennet in Pride & Prejudice (2005). She had roles in numerous British programmes and, in 2007, made her Broadway debut in The Seagull to critical acclaim.

In 2009, she gained widespread recognition for playing the lead role of Jenny in An Education, winning a BAFTA Award for Best Actress in a Leading Role and also being nominated for a Golden Globe Award and an Academy Award for her performance. She went on to star in dramatic films such as The Greatest, Wall Street: Money Never Sleeps, Never Let Me Go, Drive and Shame.

Mulligan was born in Westminster, London, England. Her father, Stephen, was originally from Liverpool, and her mother, Nano (née Booth), a college lecturer, came from Llandeilo in West Wales. Her paternal great-grandfather emigrated from Ireland. Mulligan has one sibling, an elder brother. At the age of 3, she moved with her family from England to Germany after her father accepted the job of managing the European arm of Intercontinental Hotels. Due to her father's job, her family lived in expensive hotels for 8 years. She was "quite shy" during her childhood and a tomboy until the age of 15. She was also "quite straight-laced" and very academic until age 14, having then become more interested in acting. She was educated at Woldingham School, a girls' boarding school.

The Brothers Four are an American folk singing group, founded in 1957 in Seattle, Washington, known for their 1960 hit song "Greenfields".

Bob Flick, John Paine, Mike Kirkland, and Dick Foley met at the University of Washington, where they were members of the Phi Gamma Delta fraternity in 1956 (hence the "Brothers" appellation). Their first professional performances were the result of a prank played on them in 1958 by a rival fraternity, who had arranged for someone to call them, pretend to be from Seattle's Colony Club, and invite them to come down to audition for a gig. Even though they were not expected at the club, they were allowed to sing a few songs anyway, and were subsequently hired. Flick recalls them being paid "mostly in beer."

They left for San Francisco in 1959, where they met Mort Lewis, Dave Brubeck's manager. Lewis became their manager and later that year secured them a contract with Columbia Records. Their second single, "Greenfields," released in January 1960, hit #2 on the pop charts, and their first album, Brothers Four, released toward the end of the year, made the top 20. Other highlights of their early career included singing their fourth single, "The Green Leaves of Summer," from the John Wayne movie The Alamo, at the 1961 Academy Awards, and having their second album, BMOC/Best Music On/Off Campus, go top 10. They also recorded the theme song for the ABC television series Hootenanny, "Hootenanny Saturday Night," in 1963. They also gave a try at "Sloop John B", released as "The John B Sails".

AJ Rafael (born March 12, 1989) is a Filipino American musician and Internet celebrity. He is best known for his original songs such as I Just Want You and We Could Happen. Some of his influences include Sara Bareilles, Jason Mraz, MYMP, The Beatles, John Legend, and Bob Marley..

AJ started posting on YouTube in 2006, and has since gotten over 300,000 subscribers and over 73,000,000 hits. In 2011, he was nominated to be a part of Billboard's Battle of the Bands alongside Gentlemen Hall, Otenki, Hotels, Lightning Love (band), and Side by Side.

Music Speaks was started in 2006 when looking for a charity to donate to for his concert. Since his nephew, Nathan, has autism, he decided to donate to Autism Speaks. This concert utilizes the gifts of music and dance to inspire those fortunate enough to be born without autism to speak out for those who were, by being aware of their condition and taking action towards improving their living conditions and perhaps even uncovering the mystery behind its cause. Some of the previous performers for these concerts include: