The Pussycat Dolls his "Don't Cha" was written by Cee-Lo Green and Sir Mix-a-Lot.
"99 Luftballons" by Nena is about a Cold War scare when balloons showed up on radar and were mistaken as a nuclear threat.
The Exorcist theme music is a portion of "Tubular Bells," a 25-minute song released by 19-year-old Mike Oldfield.
The Blues Traveler song "Hook" is a Peter Pan reference, but also about the catchy hook of the song, which is what "brings you back."
Bobby Freeman's '50s hit "Do You Want To Dance" was also a Hot 100 hit for Del Shannon, The Beach Boys, The Mamas & the Papas, Bette Midler and the Ramones.
Johnny Cash promised to stay true to his first wife in "I Walk The Line," but when the song became a hit he found himself on the road, having an affair with June Carter, who became his second wife.
The former Metallica bassist talks about his first time writing a song with James Hetfield, and how a hand-me-down iPad has changed his songwriting.
Gary Lewis and the Playboys had seven Top 10 hits despite competition from The Beatles. Gary talks about the hits, his famous father, and getting drafted.
The trail runs from flying saucer songs in the '50s, through Bowie, blink-182 and Katy Perry.
The Scorpions and UFO guitarist is also a very prolific songwriter - he explains how he writes with his various groups, and why he was so keen to get out of Germany and into England.
Gramm co-wrote this gorgeous ballad and delivered an inspired vocal, but the song was the beginning of the end of his time with Foreigner.
