There's a battle of the beauties brewing over at "A Chorus Line," and things just got a lot worse.

My boyfriend, Mario Lopez, is the lead. We all know Mario likes to be the center of attention, so he's banished the other "Chorus Line" hottie Nick Adams to the back of the line and even makes Adams cover his biceps when they're side-by-side.

According to Page Six, there's only so much Lopez can do. Mario was set to sign an endorsement deal with 2(x)ist underwear, but Nick has evidently won that gig.

"Mario was originally No. 1 on our radar as we planned the campaign," said a 2(x)ist insider. "We were ready to call him with an offer, but then we saw Nick. He's younger, sexy, more interesting. On top of that, his body was crazy. We set up a meeting, and when he walked in, that was it. We never even looked at anyone else after that."

Ouch. That's gotta hurt.