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Pete Wentz, 32, was all aglow Monday night thanks to his new girlfriend, model Meagan Camper!

The two have been together for a little more than a month. We caught up with them as they went to dinner, where Wentz jokingly complained about President Obama's visit to West Hollywood causing traffic problems.

The couple then met up with Christina Milian and Serena Williams, who were celebrating Serena's b-day!

See all the pics of Pete and Meagan in our gallery below!