The 43-year-old Maroon 5 frontman performed on stage on Saturday for the first time since the affair rumours first surfaced last month, as he performed with his band at the MGM Grand Garden Arena in Las Vegas. Shaq even made an appearance at one point to sing ‘This Love’ with Adam. 

Guess who else was present at the big event, though? Behati Prinsloo, his wife!. She appeared to be in good spirits as she watched Adam perform from backstage. A source told The Sun on Sunday. Despite his recent scandal, Adam Levine appears unfazed.

Adam Levine  singing with Shaq O'Neil/GettyImages

According to the source, Adam who was still wearing his wedding ring seemed to focus more on his partner than on the big audience packed for pal Shaquille O'Neal's charity foundation during the 25-minute set. The father even "purposefully" glanced at Behati, the witness claimed, as the band's hit song Girls Like You played in the background and the model appeared on the screen.

The controversy surrounding Levine began a month ago when an Instagram model, Sumner Stroh, admitted to having an affair with the singer on TikTok. Screenshots of their alleged conversation were included in the video.

In the alleged conversation, Levine, who is currently expecting his third child with his wife Behati Prinsloo, compliments her looks and asks if he could name his unborn child after her. 

After he was accused, Levine took to his personal social media accounts to issue a statement, in which he denied the cheating charges but admitted to behaving unprofessionally.

However, several women, including his former yoga instructor and a minor, have subsequently come forward to allege receiving flirtatious texts and naked pictures from Adam.

He and Behati have maintained their unity throughout the turmoil. Over the previous few weeks, they were spotted out and about together.

 According to ET sources, Adam has felt embarrassed by the current controversy and has admitted "that his actions were unacceptable. 'The Voice' former coach does not see this happening again, despite another source telling the media that the couple had relationship problems. 

In a statement that was published on his Instagram Story, the father of two responded to the accusations on his personal social media, denying the claims of adultery, but admitting to acting inappropriately.

ET was told by a source that Levine is hiding his shame. According to a source, Levine is embarrassed. "Adam wanted to address the situation as quickly as possible to prevent any rumours from spiralling out of control, the person claimed.