Gwen Stefani has released her first new music in four years.The singer has returned to her ska and reggae roots in homage to her time as the frontwoman of No Doubt and freshened things up a bit on her new single, Let Me Reintroduce Myself.In a nod to her 2004 hit Hollaback Girl, she sings: “And it tastes great, I already gave you bananas.”In a press release, Gwen said of the track: “This song is a way of saying I’m back with new music.