New York, Apr 14 : American pop singer Nick Lachey’s romance with former MTV VJ Vanessa Minnillo is apparently going through a rough patch.

According to sources, the couple “are on the rocks big time. They argue all the time, and Nick is done with her. He feels like she’s holding him back, careerwise.”

Minnillo was recently seen storming out of an Los Angeles restaurant with an angry face, while Lachey chased her in embarrassment.