That's My Girl Fifth Harmony
Dan and Katy went down to the Alexander Stadium to try out some events... With varying success!
They tried their hand at the hurdles, the long jump, and the pole vault...
... And they went HEAD TO HEAD!#
The competition was fierce, but there could of course only be one winner...
See the video, and find out who reigned supreme, below!
You can get tickets for the Aviva Birmingham Grand Prix at www.uka.org.uk or by calling 08000 55 60 56