Cimorelli.

Cimorelli is a band formed by six sisters. They have five more brothers so they are eleven kids in total. They all sing and play instruments. They used to live in the north of California but they recently moved to LA.

Cimorelli posted a video on YouTube singing "Party in the USA" in 2009 when Dani, the youngest member of the band, wasn't even in the group with her sisters. Since then, they are getting more popular and now they have lots of views. They're not like other bands in YouTube because they usually sing acapella, live and they do the background music with their voices.