Demi Lovato’s VMAs 2015: Too ‘Cool For The Summer,’ Red Carpet Dress Turning Heads – Why Is BFF Iggy Azalea Unwelcome? [PHOTOS+VIDEO]

Last Sunday, the MTV Music Awards saw the debut of a former Disney Channel singer - no, not Miley Cyrus, everybody remembers how her past performances at the show have gone down - and it was downright amazing, all the way to Demi Lovato's VMAs 2015 stunning red carpet dress!

The past few months have seen Wilmer Valderrama's girlfriend become something of a new fashion icon, as her style has changed over the years while she experiments further with her look, as well as her music and the rest of her life, and Demi Lovato's VMAs 2015 shows how much she's grown as an artist since her "Camp Rock" days.

According to Billboard, while the actress and singer has been around for a lot of editions of this award show, Demi Lovato's VMAs 2015 marks the first time she's ever performed on this stage, and how she rocked it by singing her recent hit, "Cool for the Summer"!

This amazing Demi Lovato VMAs 2015 performance also saw the singer inviting her BFF Iggy Azalea to the stage (a while before the "Fancy" rapper's wedding to Nick Young, where Lovato will be a bridesmaid), as it she had previously teased in an interview with MTV ahead of the award show.

Unfortunately, The Mirror reports that Azalea's appearance during Demi Lovato's VMAs 2015 wasn't as well received as Lovato's, as fans took to Twitter to say the rapper had "ruined" the performance and throwing harsh words at the Australian singer.

Azalea took notice and didn't seem to care all that much at all.

"Its funny to see i was trending WW, man," she wrote on Twitter. "Haters got SO MUCH to say. I was only on stage 30 seconds!"

In the meantime, her BFF took all the glory, as she's now also on every "Best Dressed" list for the event Demi Lovato's VMAs 2015 appearance was a total win!

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