Amerie and Beyonce went head to head in song. The songs that stirred up the drama are Amerie's "1 Thing" and Beyonce's "Green Light."
Beyonce's "Green Light" GMA performance:

Amerie's "1 Thing" music video:

Why this drama started up? Music heads feel that the songs are too similar in sound. Amerie dropped a mixtape that supposedly attacked Beyonce. In the new issue of XXL's Hip-Hop Soul magazine Amerie finally addresses the drama between her song "1 Thing" and Beyonce's "Green Light."

Amerie on how her song, "Because I Love You" claims Beyonce swagger jacked her style:
"I'm not dissing Beyonce at all. I'm actually really cool with the Knowles family. Her dad just did this show for the U.K. It's like this Making of the Band-style show, where he's taking young singers through a boot camp, and every week a different recording artist offers expertise. John Legend had a songwriting thing, and I did an imaging and publicity class.
Amerie on the drama:
This all I'm going to say about that: People are saying I've sampled 'Green Light' as a diss but I sampled myself from '1 Thing.' I don;t think it's that big of a deal, anyway. R&B beef is corny. 'You can't sing or dance like me!' That's so corny. I don't love rap beef, but I can understand it. Us, we're singers [laughs]. It's so unecessary.
Amerie's reaction when she heard Beyonce's 'Green Light':
"Umm, I'm not going to comment on that. I'm just going to say, I would never take a sample of any other female's music. Even on my mixtape, there isn't any other female's music being redone. I didn't sample 'Green Light' to get at her, and I'm not going at Beyonce on the record."