1. All Of Me - John Legend (+1)
2. Happy - Pharrell Williams (-1)
3. Problem - Ariana Grande f/ Iggy Azalea (HOT SHOT DEBUT)
4. Fancy - Iggy Azalea f/ Charli XCX (+3)
5. Dark Horse - Katy Perry f/ Juicy J (-2)
6. Talk Dirty - Jason Derulo f/ 2 Chainz (-2)
7. Turn Down For What - DJ Snake and Lil Jon (-2)
8. Not A Bad Thing - Justin Timberlake (+1)
9. Let It Go - Idina Menzel (-3)
10. Pompeii - Bastille (-2)
And, while no Hot 100 No. 1s featured only vocals and piano for the chart's first 53 years, three have done so since: Adele's "Someone Like You" (2011), Bruno Mars' "When I Was Your Man" (2013) and now "All." ("All has also been powered by its uptempo Tiesto remix, which many pop radio stations are favoring.) Trace the history of hit piano ballads on the Hot 100 in this Chart Beat analysis from when Mars reached No. 1 last year.
1. All Of Me +1
2. Happy -1
3. Problem HOT SHOT DEBUT
4. Fancy +3
5. Dark Horse -2
6. Talk Dirty -2
7. Turn Down For What -2
8. Not A Bad Thing +1
9. Let It Go -3
10. Pompeii -2
On the Hot 100, how rare is it for a female artist to place her first two Hot 100 hits in the top five simultaneously? Azalea is just the third to achieve the feat: Ashanti did so on the March 30, 2002 chart courtesy of her featured turns on Ja Rule's "Always on Time" and Fat Joe's "What's Luv?," while music fans of a certain age might recall that Dee De Sharp doubled up in the top five in her first two Hot 100 visits: with Chubby Checker on "Slow Twistin' " and her "Mashed Potato Time" for three weeks in April 1962.
for John's first chart topper, i love this song so much 
