Katy Perry co-wrote Iggy Azalea's hit single "Black Widow." Perry was originally going to sing on the track, but she couldn't fit it into her schedule, so Rita Ora provided the sung vocals instead.
Robert Plant's "Heaven Knows" is a satirical look at the '80s, when style seemed to trump substance.
The 1979 song "Life During Wartime" by Talking Heads deals with how technology could be exploited to take down the framework of society and enable government surveillance.
One of Tom Petty's most personal songs is "Room At The Top," which he stopped performing because it brought back painful memories.
Meghan Trainor wrote "Lips Are Movin" in just eight minutes with her writing partner Kevin Kadish. Inspiration for the song was frustration with Trainor's record label.
If what you get equals what you give away, you might as well give it all away. That's the concept behind "Give It Away" by Red Hot Chili Peppers.
Shows like Dawson's Creek, Grey's Anatomy and Buffy the Vampire Slayer changed the way songs were heard on TV, and produced some hits in the process.
The writer of "Rainy Night in Georgia" and "Polk Salad Annie" explains how he cooks up his Louisiana swamp rock.
Jon Fratelli talks about the band's third album, and the five-year break leading up to it.
Glen Ballard talks about co-writing and producing Alanis Morissette's Jagged Little Pill album, and his work with Dave Matthews, Aerosmith and Annie Lennox.
Despite her reticent personality, Adele's life and music are filled with intrigue. See if you can spot the true tales.
