Singer Jesse McCartney was left red faced on Sunday when he forgot the words to the National Anthem at a NASCAR race in California. The star was performing at the Pepsi 500 in Fontana when he fluffed a line of "The Star-Spangled Banner."

McCartney has since taken to his Twitter, blaming nerves for his embarrassing mistake.

He wrote, "Here at the Nascar race! So much fun! Can't believe I forgot the words to the Anthem! I've performed it 100 times. Bad nerves today I guess."

McCartney isn't the only star to mess up the National Anthem - Macy Gray, Anastacia and comedienne Roseanne Barr have all forgotten the lyrics to the song on public stages.

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(This news article provided by World Entertainment News Network)