Hottest Young Girl Group Takes Internet by Storm With Hit Covers

The Cimorelli sisters explode off YouTube fame to record own hit record.
1:50 | 08/28/13

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Transcript for Hottest Young Girl Group Takes Internet by Storm With Hit Covers
That's the name of the six very, very talented sisters, who have become internet sensations with more than 500,000 hits on youtube. In a moment, their first performance. First, a chat with the cimorel cimorellis. Quickly, girls, tell me your ages. 21. 23. I'm 19. I'm 18. I'm 13. Oh. And you? I'm 18. Okay. How did you first start singing together? Harmonizing together? Our mom is really good in music. She taught us how to harmonize when we were little to see if we could do it. How old? I was 4, I think. We liked it. We're just harmonizing. It must have been interesting. You have five brothers. Do they sing? They all sing and play instruments. Summertime in the cimorelli house was music time, as well. Let's go over your hits. You've taken the internet by storm with covers. Now, you have your own hit record. You just won the teen choice award for choice web star. Have you processed all this? How much your lives are changing? Barely. In the last, like, month, we went to a little tour of radio stations and stuff. We did 27 stations in 21 days. That was a lot to process. Unbelievable. Tell us about the song you're about to sing. It's your first single, "made in america." Who wrote it? We co-wrote it with david hitch and kneeian brook. It ended up being an anthem for our country. Saying how proud we are to be americans. Ladies, we're so happy to have you here.

This transcript has been automatically generated and may not be 100% accurate.

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