New mother Carrie Underwood is indulging in some much needed R&R. The country superstar rocked a bikini in a vacation selfie she shared with fans Tuesday on Instagram. “Vacation selfie #IKnowImLame,” she captioned the pic, which showed her from her shoulders up as she relaxed on a beach towel. Considering that Underwood and her hockey player husband Mike Fisher recently welcomed their first son, Isaiah, in February, it’s hardly “lame” for the star to take some time off in the lead-up to her first Mother’s Day. Besides getting in some rest and relaxation, Underwood had been rooting on her husband’s team, the Nashville Predators, who were recently ousted from the NHL playoffs.