Britney Spears nipples gym workout boobs sunglasses drenched fitness legs

Britney Spears worked out on Thursday morning, and when she saw X17 photographers, she really perked up! It does seem as though her water bottle was rather strategically place over one nipple, but she didn't seem to care too much...

Britney may be busting her butt at the gym, but she doesn't go back to Las Vegas for her "Piece of Me" residency until mid-August, so it looks like she'll be able to relax for the next few weeks.

Last month Brit added a handful of new performance dates, so it looks like the Sin City deal worked out well. Of the 27 shows she's done since late December, Brit's concert series has grossed a whopping $18.2 million, and she still has 35 more shows to go!

Not only are we glad to see her back on top, but clearly she's having a blast too:

Britney Spears nipples gym workout boobs sunglasses drenched fitness legs