Though Marc Anthony and Jennifer Lopez announced their split last summer, Anthony only filed for divorce last week. We now know what may have been behind the hold up: Anthony wanted to reconcile with Lopez, but Jenny from the Block wasn't having it.

TMZ reports that Anthony and La Lopez had a heart-to-heart talk only a few weeks ago to see if she really wanted to end their marriage for good. Turns out, she did -- because she is head over heels in love her backup dancer, Casper Smart. Sources told TMZ that Anthony was "blindsided" by her decision and didn't realize she was so serious about Smart.

While we can understand why Anthony would want to salvage the relationship (J. Lo is the world's most beautiful woman and they share two adorable tykes, four-year-old twins Max and Emme), it's been pretty evident that it's over.

In fact, it seems like Anthony was the only one shocked by the 'American Idol' judge's decision. Lopez has been getting Smart since last fall, even buying him a car for his recent 25th birthday and steaming it up onscreen with him in her new 'Dance Again' video.

For his part, Anthony has been no slouch in the dating game, either. The 'I Need to Know' singer has been dating 24-year-old Venezuelan model Shannon de Lima. We wonder how she feels about him trying to reconcile with Lopez!

The news may make the upcoming weeks a bit awkward for the former-but-friendly couple. The duo will perform together on 'Q'Viva! The Chosen.' If nothing else, it may encourage more nosy fans to tune in!