The "Glee" star showed off her hot body at the Bongo and "mtvU Spring Break 2014" party in Los Angeles on Saturday.
The brunette beauty was spotted throwing around beach balls, taking a dip in the pool and sipping coconut cocktails.
The actress also took to Instagram on Saturday to share a series of snapshots from her Bongo Jeans photo shoot.
"Hanging at spring break with @bongojeans today! Check out @bongojeans for pics all day long! #bongobreak," she wrote along with one pic.
Rivera recently sparked surgery rumors after she posted a very busty photo of herself with her fiance Big Sean at the beach. Her cleavage definitely looked more ample, especially compared for another photo of her in a revealing crop top from 2013.
But, we don't think she looks quite as enhanced in these new bikini pics!
Do you think she went under the knife? Tell toofab in the comment section below, and click "Launch Gallery" above to see more photos from the Bongo bash.
Check out the pics below to see more celebrity beach bods.