Blake Shelton and Gwen Stefani have sparked dating rumors once again as "The Voice" coaches were seen holding hands while attending two Halloween parties on Friday evening in Los Angeles, according to ETOnline.

Shelton and Stefani first went separately to George Clooney's Casamigos Halloween Party, which was held at a private residence in Beverly Hills, Calif., and it wasn't until they were both at Jared Leto's house party when things got more interesting.

A source revealed that Stefani arrived at Leto's house at around 1:30 a.m. and Sheldon was already inside with Leonardo DiCaprio, Paris Hilton, Ed Westwick, Fergie and Josh Duhamel.

About 40 minutes later, the pair left the house hand-in-hand and rode a hired car on the way out, with Shelton sitting at the front row and Stefani at the back seat of the car.

Both singers, who are currently serving as coaches for the latest season of "The Voice" on NBC, have recently split from their respective partners.

Stefani divorced her husband Gavin Rossdale after 13 years of marriage and have three children together - Kingston, nine, Zuma, six, and Apollo, one.

Meanwhile, Shelton and fellow country singer Miranda Lambert announced in July that they have called it quits after four years of marriage.