Gwen Stefani & Blake Shelton Openly Flirting on Set of 'The Voice,' Couple Getting Serious?

Blake Shelton and Gwen Stefani are not shy when it comes to showing their affection for one another.

The two goofed around with their fellow "The Voice" coaches on Monday, Dec. 7, during a commercial break of the talent show. Stefani, 46, together with Adam Levine and Pharrell Williams, gathered around Shelton's chair and took a snapshot of their group. In the photo, Shelton, 39, pretended to bite his girlfriend's shoulder as Levine and Williams stand on both of their sides.

Check out the cute snapshot on Stefani's Twitter page.

An observer told Us Weekly that the "Used to Love You" singer and the country crooner spent a number of commercial breaks together on Monday, and were spotted whispering and laughing in each other's company.

Stefani gave a standing ovation fter Shelton performed his latest single titled "Gonna" during the show, Us Weekly wrote. The song seems to pay reference to Stefani's past as the frontwoman of No Doubt. In one line, Shelton sings, "Gonna put a rock steady on your hand." No Doubt's 2001 album was titled "Rock Steady."

Stefani's representative confirmed the two's relationship to Us Weekly in November. Both parted ways from their partners, Gavin Rossdale and Miranda Lambert, this past summer.

In an interview with Extra, Shelton and Stefani discussed about the latter taking a break after the ninth season of "The Voice."

"I don't want Gwen to not be on the show, why can't we have a fifth coach?" Shelton told the news outlet. When the interviewer interjected asking why there can't be two female coaches, Shelton replied, "Why can't there be? I vote for that!"

Stefani, on the other hand, played coy. When asked who she will miss the most when she leaves the show, the recording artist answered, "I wonder..." before saying that she will miss the "chemistry" of all the coaches, Extra reported.

Christina Aguilera, a rotating judge on "The Voice," expressed her support for the romance between Shelton and Stefani knowing how difficult the spotlight and media attention can be.

"I do know from my own personal experience how difficult divorce can be," Aguilera, 34, said about her separation from Jordan Bratman after five years of marriage, as reported by Business Standard. "All I do know - from knowing Blake from so many seasons past... And knowing Gwen for even longer than that, going to each other's kids' birthday parties, etc. - they're great people."