"7th Heaven" star Mackenzie Rosman has stripped down for Maxim magazine. In the accompanying article, Rosman -- now 23 -- opens up about "7th Heaven" drinking games, her celebrity crush and former costar Jessica Biel's infamous topless photo shoot. Maxim: Are there any 7th Heaven drinking games? Mackenzie: No, but I would like to see one. You could drink whenever Ruthie rolls her eyes or when Lucy squeals. Maxim: Do you remember when she [Jessica Biel] did that topless shoot for Gear magazine while she was on the show? Mackenzie: I was probably nine at the time, but I remember that. It was a big deal. The magazine was banned on set, I think by orders of Aaron Spelling. I sneaked a peek at it, though. It was racy gossip amongst the women of 7th Heaven! Maxim: Do you have a celebrity crush? Mackenzie: I used to have a really big crush on Hayden Christensen.