The 'So Yesterday' hitmaker is gearing up for her highly-anticipated comeback to the music world and was slated to premiere her new track, 'All About You', on a US radio on Monday night.
"Guess All About You leaked... Dammit all! lol I am excited you all are loving it! Don't forget to get your own tonight @iTunesMusic please," Duff posted on her Twitter page.
Duff, who previewed a clip of the song while presenting at the Teen Choice Awards on August 10, is due to release her first studio album in seven years this autumn.