Jessie J took to the stage at the 99.7 Triple Ho Show in San Jose California this week, and was joined by Demi Lovato for a surprise collaboration of 'Bang Bang'.

The pair surprised the crowd singing together and played to huge cheers in a concert that also saw the likes of 5 Seconds of Summer play.

by for www.femalefirst.co.uk
find me on and follow me on

Tagged in