Blake Who? Miranda Lambert Performs for First Time Since Divorce - Without Her Wedding Ring

Blake, who?

Miranda Lambert grinned as she took to the stage for her first performance since news broke of her split from fellow country singer Blake Shelton.

Miranda, who sang a duet with her close friend Ashley Monroe during the show in Nashville, appeared on stage without her wedding ring.

She seemed upbeat as she sang at the bar, and fans promptly posted pictures and video of her performance - sans ring.

It comes after rumors have swirled over whether an infidelity led to the split.

Read: Blake Shelton Reportedly Upset by Rumors Miranda Lambert Cheated on Him

Website Fox 411 reported that Shelton had an affair with former Voice contestant Gwen Sebastian - but she has branded the claims "silly and stupid."

According to another report, it was Miranda Lambert who had a "long time affair" and she fessed up to after Blake Shelton confronted her.

Nashville radio host Moose Michaels recently saw the former couple at a party.

“This has got really nasty, it's like you see mom and dad fighting and you don't know what to do," he said. "They left separately, he went out the front door, she went out the back and I didn't see them talking very much at all."

Read: Miranda Lambert Breaks Down on Stage Days Before Divorce Announcement

Shelton and Lambert have also made their split official on social media this week by erasing photos of each other.

Watch Below: Did Miranda Lambert Spy on Blake Shelton Before Their Divorce?