Mötley Crüe drummer Tommy Lee and singer Sofia Toufa have announced their engagement. This would be Lee's fourth marriage.

"There comes a time in a man's life when you just know your partner is for LIFE!!" Lee, 51, tweeted. "Say hello to my fiancé and soon to be wife, SOFI," Toufa's stage name, an acronym for "Some Other Female Interest."

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Toufa, 30, tweeted two minutes later, "I'm something that rhymes with Beyoncé!"

The two have been in a relationship since at least 2010. Lee told a newspaper the following year, "She's the one, for sure."

Lee and the German-Greek Toufa had worked together as early as 2007, when she sang backup with Rock Star Supernova -- the "supergroup" band formed with Lee and others for the CBS reality show "Rock Star: Supernova."

Lee, who was born in Athens, Greece, but raised in California from age 1, was first married to model Elaine Starchuk in the 1980s. From 1986 to 1993, he was wed to actress Heather Locklear. Lee then married actress and Playboy Playmate Pamela Anderson in February 1995 after a courtship of just four days. The couple had two children, sons Brandon, 17, and Dylan, 16, but in March 1998, Anderson filed for divorce. The couple later reconciled but did not remarry and broke up again in 2001. They briefly reconciled in 2008.

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Mötley Crüe announced last month that the band was embarking on a worldwide retirement tour.