I was on vacay in Tampa last week, but I was already back in Iowa before Saturday's Jingle Ball concert. I can't believe I missed this! My two favorite ladies--Demi Lovato and Tove Lo--performed AT THE SAME TIME.

Demi surprised the crowd and brought Tove Lo on stage for a "Cool For The Summer" collabo. I'm squirming with jealously at everyone was there to witness it!

Demi then posted this on Instagram. I'm pretty sure I'm going to blow this up and hang it in my room...

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