Britney Spears, the singer, has remembered she needs to do some sort of promo for her music and will have a singsong at the iHeartRadio festival in Las Vegas in September.

Other people promoting various things over the two days (September 23 and 24, calendar fans) include Ariana Grande, OneRepublic, Usher, Sia, Tears For Fears (!) and, you guessed it, Pitbull.

Here's the video announ­cing it all:

U2 will be there as well actually. :(