Demi Lovato experiences nipple slip at concert

Demi Lovato reportedly experienced a nipple slip at a recent concert.

The 'Skyscraper' singer was performing in Dallas, Texas when her dress slipped, partially revealing her left nipple, Hollywood Life reports.

However, the star was undeterred by the wardrobe malfunction, happily tweeting about the show afterwards.

"Dallas was on fire last night! New Orleans here we go!" Lovato wrote.

In November, the star expressed thanks for the progress she has made over the past year in her personal life.

Lovato checked into rehab in November 2010 to seek treatment for an eating disorder.