Carrie Underwood has apologized to actor Matthew McConaughey after making a sexual joke about the dashing star during her acceptance speech at the Academy of Country Music Awards in Las Vegas last Sunday night.

McConaughey, who was handing over the prize for Entertainer of the Year, used his time in front of the audience to tell a story about how he and his brother used to pick up girls by telling them they made boots for country star George Strait.

“We’re like, ‘Oh yeah. Say, as a matter of fact, out in the parking lot, in the trunk of our white Corvette, we have the next year’s new edition white ostrich quill George Strait signed series that he’s gonna wear on tour next year,’” Matt told the audience on Sunday night. “And they got pretty excited about that and said, ‘Well, can we see? Can we see? Can we see?’ And we obliged … Point of the story is, we got lucky that night. Thank you, George.”

When Carrie joined the actor on the podium, she quipped, “I want to see those boots, Matthew.” The singer admits she now regrets her choice of words–particularly since Matthew is an attached man with an infant son.

“I’m so embarrassed, I totally embarrassed myself,” Carrie told FOX News’ PopTarts column just after the ceremony. “I just blanked. You want to say something eloquent in a moment like that and I embarrassed myself. I’m sorry Matthew, I’m sorry to my family. I’m totally embarrassed.”