Look what we've just found...


...a video of not one, not two, but THIRTEEN famous female singers singing Just Stand Up at last year's Fashion Rocks event, in aid of the Stand Up To Cancer campaign - you can tell it's old from Beyonce's hair style!

Let's play spot the celebrity:

Did you get them all? Here's the full list of celebrities:

1) Keyshia Cole

2) Fergie

3) Leona Lewis

4) Ciara

5) Carrie Underwood

6) Mariah Carey

7) Mary J Blige

8) Beyonce

9) Miley Cyrus

10) Rihanna

11) Ashanti

12) Natasha Bedingfield (we mistook her for one of the PCD's at first!)

13) Nicole Scherzinger

We seeing celebrities interact with each other - Beyonce and Miley look like they get along well, don't they!

How many celebrities did you spot? Let us know below!