There will soon be a new Mrs. Sixx as Motley Crue bassist Nikki Sixx has announced he and girlfriend Courtney Bingham plan to marry. The two have been dating since November 2010; it's the third marriage for Sixx after unions to Playboy Playmate Brandi Brandt and actress Donna D'Errico.

Sixx revealed the happy news on Facebook:

"When Courtney and I were in St Bart's I popped the question and she said YES....We would like to thank everybody who has been tweeting and posting online us congratulations....Both of us and our families are beyond happy.

The 53-year-old has used Facebook to make a number of important announcements recently, including a touching statement about his grandfather's battle with terminal cancer. The 27-year-old Bingham has joked in interviews about the age gap between the two. "My dad and Nikki are the same, so that was pretty funny," she said in an interview with Planet Love Match.

However she says it's not weird between them because they live a pretty mellow life. "I don't know how he could be with someone his age, it would be impossible."