Comic Relief's charity single has been beaten to the top of the charts by Flo Rida featuring Kesha, with Right Round.
The Saturdays' cover of Depeche Mode's Just Can't Get Enough, in aid of Comic Relief, went straight in at number two.
Meanwhile, Lady Gaga's Poker Face stuck at number three, and last week's chart-topper Kelly Clarkson dropped to four.
In the album chart, U2 are celebrating their 10th number one with No Line On The Horizon, after outselling the rest of the top five put together.
U2 have been in the music industry for 29 years so far
The success of their latest release means they're now one of the all-time top five acts in the UK, according to the Official Charts Company.
The only acts who've had more number one albums in the UK are the original king of rock and roll Elvis Presley and The Beatles.