Glee's Naya Rivera was living it up in Las Vegas for her birthday once again. "Getting ready to celebrate at @1OakLV! So excited!" the FHM cover girl tweeted before heading out to the Mirage Hotel's 1 Oak nightclub. While it certainly wasn't as skimpy as some of her 2011 ensembles, Naya's lavender dress still spelled S-E-X-Y. Check out the Adele mash-up minx as she tears up Sin City for her 25th birthday, then tell us below (or on Facebook or Twitter) whether you preferred this year's outfit to last year's gold getup.