VIDEO : Gwen Stefani and Blake Shelton Take PDA-Packed Selfie on ?The Voice?

Blake Shelton and Gwen Stefani took PDA to a whole other level last night. The two got silly with their co-stars on The Voice on Monday, while posing for a selfie during a commercial break. In the pic, the country crooner pretends to bite his girlfriend?s shoulder as Pharrell Williams and Adam Levine stand beside them. The ?Used to Love You? singer took to Twitter to share the cute selfie. Not only did Shelton playfully bite Stefani, but he also kissed her in front of the audience during the show.