Karina Smirnoff MLOPEZKARINA042207_17.jpgOn-and off-screen couple Mario Lopez and Karina Smirnoff (of DWTS fame) have called it quits, a source confirms to X17online.

Karina, who had been living with Mario in his LA house, has already packed her bags and moved out after suspecting Mario had developed a wandering eye.

Why the breakup? X17 has the exclusive info ... Karina was apparently not too happy about seeing a picture of Mario flirting with a Hooters girl (we'll have that coming soon), but the last straw was when she found out Mario was partying in NYC last weekend...with none other than Dancing With the Stars judge Carrie-Ann Inaba!

Scandalous!