Adam Noah Levine is an American singer-songwriter, multi-instrumentalist,  and actor, widely known as the lead vocalist for the Los Angeles pop rock band, Maroon 5. Born and raised in Los Angeles, California, Levine began his musical career in 1994, when he co-founded the alternative rock band Kara's Flowers, of which he was the lead vocalist and guitarist. After the commercial failure of their only album, The Fourth World (released in 1997), the band split up. In 2001, the group was reformed – with guitarist James Valentine joining the line-…