Top of the Pops, 21st May 2015

Another week, another exclusive one-off collaboration. This time, Nicki Minaj can't be here to sing (and rap) Hey Mama so David Guetta recruits Ariana Grande for the chorus and Meghan Trainor for the verses. Both singers are in the studio to perform their own hits as well.

Higher up the chart there are big new entries for LunchMoney Lewis and Galantis, and OMI holds his place at the top.

Debuts: LunchMoney Lewis, Galantis, Fetty Wap.

LunchMoney Lewis - Bills

Highest New Entry - Straight in at number 2

Meghan Trainor - Dear Future Husband

Up 1 to number 20

Ariana Grande - One Last Time

Up 3 to number 33

Hozier - Someone New

Up 3 to number 24

Galantis - Runaway (U & I)

In at number 4

Fetty Wap - Trap Queen

Up 9 to number 29

David Guetta ft. Meghan Trainor and Ariana Grande - Hey Mama

High Climber - Up 30 to number 47

OMI - Cheerleader

Third week at number 1

PRESENTER: JB Gill