"Regulate" by Warren G. & Nate Dogg broke new ground by sampling a mellow, melodic hit from the '80s: "I Keep Forgettin'" by Michael McDonald.

Elvis Presley recorded "Always On My Mind" in 1972, but Willie Nelson's version 10 years later was the hit and won the Song of the Year Grammy.

Eric Clapton wrote "Wonderful Tonight" while waiting for his girlfriend, Pattie Boyd, to get ready for a night out. By the time she was ready, he had written the song.

"Unchained Melody" first appeared in a 1955 movie called Unchained. The Righteous Brothers recorded it in 1965, and their version was resurrected in the 1990 movie Ghost.

The video for Iggy Azalea's "Fancy" pays homage to the classic 1995 film Clueless with the rapper playing Cher and featured singer Charli XCX portraying Tai. It was filmed at some of the same locations used in the movie.

"Veronica" was inspired by Elvis Costello's grandmother, who suffered from Alzheimer's disease.
Todd Rundgren explains why he avoids "Hello It's Me," and what it was like producing Meat Loaf's Bat Out of Hell album.
We've heard of artists putting their hearts into their music, but some take it literally.
One of Canada's most popular and eclectic performers, Hawksley tells stories about his oldest songs, his plentiful side projects, and the ways that he keeps his songwriting fresh.
Dan cracked the Top 40 with "Ritual," then went to India and spent 2 hours with the Dalai Lama.
How well do you know your David Bowie lyrics? Take this quiz to find out.