Blake Shelton and Gwen Stefani have re-sparked those recent dating rumors.
"The Voice" coaches spent all of Friday evening together, dressed up in full Halloween attire as they attended two A-list parties in Los Angeles.
Stefani stepped out as a sexy (and bloody!) cowgirl, while Shelton wore a Mexican Serape poncho over a flannel shirt and a red-and-white trucker hat. The two started their night off at George Clooney's Casamigos Halloween Party, arriving separately to the bash that was held at a private residence in Beverly Hills, California. An eyewitness tells ET that the two didn't show any signs of PDA at the star-studded soiree -- but that apparently wasn't the case later on in the night.
A source tells ET that Stefani, 46, left the Casamigos party alone around 1:30 a.m., and headed straight to Jared Leto's house party in the Hollywood Hills. Shelton was already there when she arrived, according to the source, along with Leonardo DiCaprio, Paris Hilton, Ed Westwick, Fergie and Josh Duhamel.
Stefani stayed for about 40 minutes, then left the house holding Shelton's hand. According to the source, the 39-year-old country singer was walking behind her as she guided him through to exit. Shelton and Stefani apparently let go of each other's grasp, however, when they noticed a photographer in sight.
The two still left the party together, however, with Stefani taking the very back seat of a hired car and Shelton sitting in the row right in front of her. The eyewitness says the two "looked happy."
The party was allegedly shut down by cops at 4:30 a.m., and at 5 a.m., remaining guests were still leaving the celebration, according to a source.
Part of the reason for rumors about the two dating are because both singers are recently single. Shelton divorced Miranda Lambert in July, while Stefani settled the terms of her divorce from Gavin Rossdale last week.