Jason Derulo and Demi Lovato were MORE than happy to introduce Maroon 5 for their performance This image appears in the gallery:MTV VMAs 2014: The 38 BEST Pictures From This Year's Video Music Awards 10. Jason Derulo and Demi Lovato were MORE than happy to introduce Maroon 5 for their performance 38 images See the full gallery: MTV VMAs 2014: The 38 BEST Pictures From This Year's Video Music Awards