Miley Cyrus shot her new music video for "We Can't Stop" on Thursday, and based on the smile on her face, we have to wonder if she has in fact split from fiance Liam Hemsworth.

A photographer on set tells X17online exclusively:

    "She was with, like, 20 friends on the set and it was a total party atmosphere. Her mom was there and they were all happy and laughing -- Miley didn't looked upset about relationship issue with Liam; she was on top of the world."

The couple have been plagued by break up rumors for months now, but the reports resurfaced again this week when Us Weekly claimed Cyrus' "childish" rebellion tore her and Liam apart and that the Hemsworth family is extremely relieved about the split.

Our photog added, "Liam wasn't on set, but Miley had her ring on -- she didn't seem like a girl who had just called off her engagement." Maybe all's well with these two? We can't tell what Liam grunted the other day when we asked him, but he didn't say no!

And those white pants? Hot damn!