I think they did a great job! Their voices were really good, their costumes looked awesome. And this was their first time singing together right? I was very excited and still excited now!!
But I really don't like how Mika's getting famous from 'featuring Ariana Grande'. Don't get me wrong, I like Ariana very much personally, but I just get frustrated when most of Ariana's fans think that Popular Song is her song. You know, just look at the video of the performance Mika did in Perez Hilton studio, the comments are mostly about 'how Mika doesn't sound great without Ariana', 'where is Ariana', 'I only like the version with Ariana'. Mika should get popular from the works he did, not as 'a singer who sang with Ariana Grande'.
Other than that, I really like seeing them together:thumb_yello: I liked the way Mika was hunching his back most of the time hahaha