Kelly is known for various songs including "I Believe I Can Fly", "Bump N' Grind", "Your Body's Callin'", "Gotham City", "Ignition (Remix)", "If I Could Turn Back the Hands of Time", "The World's Greatest", "I'm a Flirt (Remix)", and the hip-hopera "Trapped in the Closet". In 1998, Kelly won three Grammy Awards for "I Believe I Can Fly". Although Kelly is primarily a singer-songwriter, he has written, produced, and remixed songs, singles and albums for many artists. In 1996, he was nominated for a Grammy Award for writing Michael Jackson's song "You Are Not Alone". In 2002 and 2004, Kelly released collaboration albums with rapper Jay-Z and has been a featured vocalist for other hip hop artists including Nas, Sean Combs, and The Notorious B. I. G. .