Lea Michele and Naya Rivera Vie for the Title of Sexiest Glee Star—See Their Sheer Ensembles!

Both ladies were dressed to kill last night at the bash in honor of the hit show's 100th episode

Forget battling it out in the choir room! Because these two Glee stars are seemingly duking it out on the red carpet, giving each other a run for their money over who can show the most skin.

Both Naya Rivera and Lea Michele rocked gorgeous, ultra-sexy ensembles to last night's bash in honor of Glee's 100th episode, and it goes without saying that both beauties turned heads.

Michele, 27, rocked a see-through lacy black dress by Milly which left little to the imagination and accented her bangin' bod in all the right places. She paired the sheer and sultry look with a pair of sky-high stiletto Brian Atwood heels and a sleek ponytail, adding a simple gold ring as her only accessory.

Meanwhile, Rivera, 27, flaunted her killer cleavage in a low-cut Bec and Bridge black dress, which featured an open back that highlighted her toned and trim figure. She added a gold and black choker necklace, black pointed-toe pumps and wore her hair down in a wavy style, showing off her sultry look as she posed for pics.

The "Cannonball" singer even joked about her skin-bearing style when speaking with E! News on the red carpet. When asked who she was wearing, the actress dished on the designer (Milly) before adding, "and underwear" with a laugh.

Prior to the bash, Michele took to Twitter to share her excitement for the highly anticipated 100th episode, writing, "Can't wait for tonight's 100th episode of #Glee! I'm so proud to be part of such an amazing show that brings me such joy every single day."

And Rivera did the same, tweeting, "'Being a part of something special makes you special'. Glee has and continues to be one of the most special journeys in my life," she wrote. "Thank you to the fans, crew, producers, directors, 20th, and most importantly the cast for making these 100 episodes truly magical. Enjoy!"

Hours earlier, Big Sean's fiancée sparked plastic surgery rumors after she posted a very busty Instagram photo of herself on the beach with her man. While fans couldn't help but speculate in the comments whether or not Rivera went under the knife for a boob job, in all fairness, it may have just been the angle of the pic or a padded swimsuit. She also told E! News on the carpet that she posted the cleavage-baring snapshot because she simply likes sharing pics with her fans.

Regardless, there's no question both Lea and Naya look great. But only one star can take home the sexy trophy—so who gets your vote?!