Swedish House Mafia is a Swedish house music group composed of Axwell, Steve Angello and Sebastian Ingrosso. Over the years, they have produced hit songs such as "Don’t You Worry Child," "Save The World," "Greyhound" and more. They have three albums: Until Now, Until One and One Last Tour, which is a live soundtrack. Ty Dolla $ign, also known as Tyrone William Griffin Jr., is an American singer, songwriter, multi-instrumentalist and record producer. Danielle Balbuena, known by her stage name 070 Shake, is a hip-hop artist from New Jersey. At only 22, she has collaborated with some of hip-hop's finest, including Kanye West, Pusha T and Teyana Taylor. Swedish House Mafia's Tonight Show appearance will be their debut TV performance on the heels of announcing their reunion after 8 years away.