Adam Levine
Model Behati Prinsloo posted a nearly nude photo of her fiance Adam Levine on Instagram this week. Instagram

Musician Adam Levine opened up in more ways than one this week.

The Maroon 5 front man and judge of “The Voice” started the week by bashing the MTV Video Music Awards Monday, before later posing a revealing photo on fiancé Behati Prinsloo’s Instagram page Wednesday. “70s porn called. It wanted its vibe back. Immediately,” wrote Prinsloo, a 24-year-old Victoria’s Secret model. The couple gave no context for the revealing photograph, which currently has over 19,000 “likes” on Instagram, despite fan's requests for more information.

Prior to his physical reveal, the 34-year-old singer hinted at his disappointment over the annual MTV Video Music Awards Sunday on his official Twitter account. “The VMA's seriously used to be so awesome,” said Levine, who previously confessed he doesn’t take to social media unless inspiration strikes. “I don't tweet unless I have something to say. So, this tweet is a rare exception,” he wrote earlier this month.

The couple last made headlines after announcing their engagement in July just weeks after Levine was spotted vacationing with model Nina Agdal in Cabo San Lucas, Mexico. Levine’s rep told People magazine that the singer immediately proposed to Behati, his former girlfriend of less than one year, after a recent reconciliation. “Adam Levine and his girlfriend Behati Prinsloo are excited to announce they are engaged to be married. The couple recently reunited and Adam proposed this weekend in Los Angeles.”

Levine can be seen next on the season five premiere of NBC’s reality singing competition “The Voice” on Sep. 23.