Michael and Carissa Alvarado of the group Us the Duo, otherwise known as Vine's first viral music sensation, first graced the internet with a #6SecondCover of John Legend's "All of Me" in 2013. An instant hit, the couple's account gained over 1 million followers in 30 days. 3.4 million additional followers later and a record deal with Republic Records in hand, the Alvarado's reminisce on what they feel in large part was an accidental start of their career. "It's a partial accident," Michael said during the Grammy Connect panel on Wednesday at YouTube Space LA. "When Vine came along we...

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