The 20 alternative songs you need to know this week, according to you, your host Cubby, and the rest of the world.

Bob Weir, the singer, songwriter, guitarist, and co-founder of the Grateful Dead, whose songs about sunshine daydreams and truckin’ helped turn the jam band into a 60-year musical empire, has died at age 78. Join us as we pay tribute to him on our Grateful Dead: DNA. Long live Ace.

Always fresh and always current, these are the hottest hits from Latin artists making an impact right this very moment.

Does Justin still have "Swag?" Find out on his Artist DNA station, where his new surprise album just dropped.

Ciara is back, giving us a taste of what's to come from her upcoming album.