Christina Aguilera poked fun at her Super Bowl slip-up on U.S. TV on Monday (16May11) by telling wannabe pop stars to memorise the National Anthem if they want to succeed.
The Beautiful hitmaker visited David Letterman's Late Show to read out her Top 10 list of tips for aspiring singers and mocked her now-infamous blunder when she forgot the lyrics to the Star Spangled Banner at the 2011 sporting event.
Aguilera's number 10 tip was: "Try to be born with an awesome voice!" and she also deadpanned, "If your name is Bieber, change it to Larry Bieber."
She also joked, "Be a triple threat - I'm a singer, actress and part-time tax accountant," before quipping: "Very important tip - learn the lyrics to the National Anthem."