1. What was the Billboard No. 1 song on January 30, 1999
“Slide” by Goo Goo Dolls
“Save Tonight” by Eagle Eye Cherry
“Have You Ever? by Brandy
“...Baby One More Time” by Britney Spears
2. July 29, 2000?
“Try Again” by Aaliyah
“It's Gonna Be Me” by NSYNC
“Higher” by Creed
“Jumpin', Jumpin'” by Destiny’s Child
3. July 5, 2008?
“Forever” by Chris Brown
“I Kissed A Girl” by Katy Perry
“7 Things” by Miley Cyrus
“Viva La Vida” by Coldplay
4. Sept. 27, 2008?
“So What” by Pink
“Paper Planes” by M.I.A.
“American Boy” by Estelle featuring Kanye West
“Disturbia” by Rihanna
5. June 23, 2009?
“Single Ladies (Put A Ring On It)” by Beyonce
“Just Dance” by Lady Gaga featuring Colby O'Donis
“Love Story” by Taylor Swift
“My Life Would Suck Without You” by Kelly Clarkson
6. Oct. 24, 2009?
“Party In The U.S.A.” by Miley Cyrus
“3” by Britney Spears
“Whatcha Say” by Jason Derulo
“Use Somebody” by Kings of Leon
7. June 19, 2010?
"California Gurls" by Katy Perry featuring Snoop Dogg
“Bulletproof” by La Roux
“OMG” by Usher featuring will.i.am
“Your Love Is My Drug” by Ke$ha
8. Sept. 18, 2010?
"Just The Way You Are" by Bruno Mars
“Mine” by Taylor Swift
“Teenage Dream” by Katy Perry
“Dynamite” by Taio Cruz
9. Dec. 11, 2010?
"Grenade" by Bruno Mars
“Just A Dream” by Nelly
“Only Girl (In The World)” by Rihanna
“Raise Your Glass” by Pink
10. Jan. 29, 2011?
"Black and Yellow" by Wiz Khalifa
“The Time (Dirty Bit)” by The Black Eyed Peas
“Hold It Against Me” by Britney Spears
“What's My Name?” by Rihanna
11. April 9, 2011?
"E.T." by Katy Perry featuring Kanye West
“F**k You! (Forget You)” by Cee Lo Green
“F**kin' Perfect” by Pink
“Born This Way” by Lady Gaga
12. Aug. 27, 2011?
"Super Bass" by Nicki Minaj
“Last Friday Night (T.G.I.F.)” by Katy Perry
“Pumped Up Kicks” by Foster The People
“Good Life” by OneRepublic
13. March 3, 2012?
"We Are Young" by fun. featuring Janelle Monae
“Rolling In The Deep” by Adele
“Stronger (What Doesn't Kill You)” by Kelly Clarkson
“Part Of Me” by Katy Perry
14. Sept. 1, 2012?
"Titanium" by David Guetta featuring Sia
“As Long As You Love Me” by Justin Bieber featuring Big Sean
“Call Me Maybe” by Carly Rae Jepsen
“We Are Never Ever Getting Back Together” by Taylor Swift
15. Sept. 29, 2012?
"One More Night" by Maroon 5
“Whistle” by Flo Rida
“Lights” by Ellie Goulding
“Good Time” by Owl City & Carly Rae Jepsen
16. Sept. 14, 2013?
"Blurred Lines" by Robin Thicke featuring T.I. + Pharrell
“Roar” by Katy Perry
“Royals” by Lorde
“Radioactive” by Imagine Dragons
17. Feb. 8, 2014?
"Pompeii" by Bastille
“Timber” by Pitbull featuring Ke$ha
“Counting Stars” by OneRepublic
“Dark Horse” by Katy Perry
18. Sept. 6, 2014?
"Shake It Off" by Taylor Swift
“All About That Bass” by Meghan Trainor
“Stay With Me” by Sam Smith
“Chandelier” by Sia
19. Nov. 29, 2014?
"Habits (Stay High)" by Tove Lo
“Animals” by Maroon 5
“Blank Space” by Taylor Swift
“Jealous” by Nick Jonas
20. June 6, 2015?
"Earned It (Fifty Shades Of Grey)" by The Weeknd
“Uptown Funk!” by Mark Ronson featuring Bruno Mars
“Bad Blood” by Taylor Swift featuring Kendrick Lamar
“Want To Want Me” by Jason Derulo
21. Aug. 22, 2015?
"Drag Me Down" by One Direction
“Can't Feel My Face” by The Weeknd
“Fight Song” by Rachel Platten
“See You Again” by Wiz Khalifa featuring Charlie Puth
22. May 28, 2016?
"Can’t Stop The Feeling!" by Justin Timberlake
“7 Years” by Lukas Graham
“Pillowtalk” by Zayn
“Needed Me” by Rihanna