Six60 to play Eden Park. He may have played to millions in a historic gig at Eden Park, but Friday night will be memorable for Six60 keyboardist Marlon Gerbes for another reason: He got engaged. Gerbes proposed to his girlfriend, yoga instructor Monica Cronin, following the concert, which saw Six60 play alongside other acts including Dave Dobbyn, Troy Kingi, and Draz Project in a seven-hour extravaganza. Monica Gerbes/Instagram Monica Cronin's photo appeared to have been taken immediately following the proposal. “Forever with my love,” Cronin captioned a black-and-white photo posted on Instagram that appeared to be taken immediately after the proposal. Cronin, holding a glass of champagne, is pictured wiping a tear from her eyes, while Gerbes embraces her.