Vocal Group, Teen Pop, @ Cimorelli - "I'm a Mess" single HQ Cover Photoshoot 2016
(Wikipedia) More at YouTube (Source)
Cimorelli is a singing group popularized on YouTube and signed to Universal Music's Island label. Cimorelli is made up of six sisters, Christina, Katherine, Lisa, Amy, Lauren, and Dani. Their singing style is mostly using a cappella with occasional instruments. They started posting covers of songs on YouTube, before releasing original songs., the group has released five Extended Plays.