Tommy Lee might be saying goodbye to life on the road with Motley Crue, but he's saying hello to the married life.

The drummer, set to mount a final tour this year with his longtime band, is engaged to Sofia "SOFI" Toufa, a German singer and dancer who's been his long-time girlfriend. It's Lee's fourth marriage. He's 51 and she's 30. Lee announced the pending nuptials via Twitter, saying "there comes a time in a man's life when you just know your partner is for life." Meanwhile, his fiancee tweeted that she was now "something that rhymes with Beyonce!"

Toufa has worked with pop stars like Avril Lavigne, Fall Out Boy, Britney Spears and Nelly Furtado over the years. Lee was previously married to actresses Heather Locklear and Pamela Anderson, as well as model Elaine Starchuk.