iHeartRadio kickstarted the festivities of December with Jingle Ball Tour. Everyone from Britney Spears to Fifth Harmony, Justin Bieber to Bruno Mars, performed at the Jingle Ball 2016.
Here are some of the highlights that happened.
Britney Spears received a surprise birthday celebration, after turning 35 on Friday 2 December.
Fifth Harmony performed their girl power hit 'That's My Girl'
Meghan Trainor performed, 'Me Too'
And Tanya Rad, co-host to Ryan Seacrest for the night received barged into their dressing rooms to get as many singers under the mistletoe as possible:
Watch: @FifthHarmony, @Meghan_Trainor & more caught kissing under the mistletoe at #KIISJingleBall! https://t.co/kmWKV5l0KI pic.twitter.com/ZADbrgbJIe
— On Air/Ryan Seacrest (@OnAirWithRyan) December 3, 2016