NASHVILLE, TN (CBS Local) – Nashville Predators fans thought they were in for a special night when hometown stars Lady Antebellum came out to sing the national anthem before the team’s playoff game on May 5. The mood quickly changed when the award-winning music group forgot the words to “The Star-Spangled Banner.”

Hockey fans at Bridgestone Arena in Tennessee groaned with displeasure when singer Charles Kelley skipped a line in the song and had to stop and regroup before the trio finished the performance. Kelley and bandmates Hillary Scott and Dave Haywood took to Twitter after the nationally-televised flub to apologize for their anthem mishap.

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Kelley added on his own account that he had never messed up the national anthem before and the embarrassment would likely result in a very sleepless night.

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Things didn’t get any better for Predators fans as their team went on to lose the crucial Game 5 matchup with the Winnipeg Jets in the second round of the NHL Playoffs.

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Fans of the victorious Canadian squad added insult to injury by pointing out that the opponent’s national anthem was sung flawlessly.