Most pop songs utilize a bass line, and quite a few of them also contain piano. But when you have two songs that use nearly identical bass and piano, you run into allegations of plagiarism -- as Delta Goodrem discovered after releasing her latest single, 'Sitting on Top of the World.'

'World' bears a certain resemblance to 'Rebellion (Lies),' a track from Arcade Fire's 2004 album 'Funeral' -- and while the two songs don't really have anything in common lyrically, their musical similarities have raised the ire of some Arcade Fire fans, including recording artist Darren Cross, who has encouraged the band to sue Goodrem. For her part, Goodrem -- who wrote the song with songwriting doctor du jour John Shanks -- insists she'd never heard the Arcade Fire track before the controversy erupted. "I checked it out and was blown away," she recalled. "They're incredible. I think the whole thing was a bit of a storm in a teacup."

It seems unlikely that anyone will be filing any lawsuits over this, but have a listen for yourself and see what you think -- is there something more than a coincidental similarity here?

Listen to Arcade Fire, 'Rebellion (Lies)'

Listen to Delta Goodrem, 'Sitting on Top of the World'