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.
A perfume called Wonderstruck was named after a line in Taylor Swift's song "Enchanted": "I'm wonderstruck, blushing all the way home."
The song "Without You," a hit for Nilsson in 1972 and Mariah Carey in 1994, was written and originally recorded by Badfinger in 1970.
AC/DC's 1990 song "Mistress For Christmas" is about Donald Trump, who was in the news because of his affair with the model Marla Maples.
Beck's "Where It's At" is a nod to the early years of hip-hop when DJs would use two turntables to loop drum breaks, and a microphone to hype the crowd ("two turntables and a microphone...").
In Gary Numan's "Cars," the message is that cars lead to a mechanical society devoid of personal interaction. This didn't stop automakers from using it in commercials. Both Nissan and Oldsmobile have used it in ads.
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.
On Glen's résumé: hit songwriter, Facebook dominator, and member of Styx.
Some album art was at least "inspired" by others. A look at some very similar covers.
Kiss is the subject of many outlandish rumors - some of which happen to be true. See if you can spot the fakes.
Laura Nyro talks about her complex, emotionally rich songwriting and how she supports women's culture through her art.
Before he was the champ, Ali released an album called I Am The Greatest!, but his musical influence is best heard in the songs he inspired.