Some of these might surprise you .

We all have those songs we love and can never seem to get out of our heads. But what if you found out your favorite track was written by someone other than the artist who sings it? Here are the singles where another vocalist has the writing credit:

1.“Till the World Ends"byBritney Spears

2.“Forget You"by CeeLo Green

3.“We Found Love"byRihannafeaturingCalvin Harris

4.“Irreplaceable"byBeyoncé

5.“Material Girl"by Madonna

6.“My Heart Will Go On"by Céline Dion

7.“Get the Party Started"by Pink

8.“Party in the U.S.A.“by Miley Cyrus

9.“Little Things"by One Direction

10.“Breakaway"by Kelly Clarkson

11.“Pretty Hurts"by Beyoncé

12.“Manic Monday"by The Bangles

13.“Bleeding Love"by Leona Lewis

14.“Can U Handle It"by Usher

15.“You’ll Always Find Your Way Back Home"by Miley Cyrus

16.“Don’t Cha"by The Pussycat Dolls featuring Busta Rhymes

17.“Black Widow"by Iggy Azalea featuring Rita Ora

18.“Cruel Summer"by Taylor Swift

19.”…Baby One More Time"by Britney Spears

A portrait of Britney Spears.

Cee Lo Green performing onstage

Rihanna on the red carpet.

Beyoncé on the red carpet

A portrait of Madonna.

A portrait of Céline Dion.

A portrait of Pink.

Miley Cyrus on the red carpet.

Group photo of One Direction.

Kelly Clarkson performing onstage.

Beyoncé performing onstage.

A portrait of The Bangles.

Leona Lewis performing onstage.

Usher performing onstage.

Miley Cyrus on the red carpet.

The Pussycat Dolls on the red carpet

Iggy Azalea on the red carpet.

Taylor Swift performing onstage.

A portrait of Britney Spears.