The fadeout on Drake's "Hotline Bling" lasts 55 seconds - one of the longest outros of any hip-hop hit.
When "Last Friday Night (T.G.I.F.)" climbed to #1 on the Hot 100, Katy Perry became the first woman to send five songs from one album to the top of the charts. The four previous chart-toppers from her Teenage Dream set were "California Gurls," "Teenage Dream," "Firework" and "E.T."
The Four Seasons' "Walk Like a Man," released in 1963, was the first Hot 100 #1 hit with a simile in its title.
"What A Wonderful World," released in 1967 four years before Louis Armstrong died, didn't find an audience in America until 1988 when it was used in the movie Good Morning, Vietnam.
If you have a whole day to kill, you can check out the full version of Pharrell Williams' "Happy" music video, the world's first 24-hour music video.
The comedian Steve Martin had a hit in 1978 with "King Tut." The Nitty Gritty Dirt Band, who Martin would open for on tour, were his backing band on the song.
When he was asked to write a song for the Singles soundtrack, Mark thought the Seattle grunge scene was already overblown, so that's what he wrote about.
Taylor talks about "The Machine" - the hits, the videos and Clive Davis.
Nick made some of the biggest videos on MTV, including "The Final Countdown," "Heaven" and "Don't Know What You Got (Till It's Gone)."
What are the biggest US hits with French, Spanish (not "Rico Suave"), Italian, Scottish, Greek, and Japanese titles?
"25 or 6 to 4" to "Semi-Charmed Life" - see if you can spot the songs that are really about drugs.
Daryl Hall's TV show is a hit, and he's been inducted into the Rock and Roll Hall of Fame - only one of these developments excites him.