Believe in U / Don't Stop

Karl Martin Sandberg (born 26 February 1971), known professionally as Max Martin, is a Swedish record producer and songwriter. He rose to prominence in the late 1990s with songwriting credits on a string of hit singles, such as Britney Spears's "...Baby One More Time" (1998), the Backstreet Boys' "I Want It That Way" (1999), Celine Dion's "That's the Way It Is" (1999), and NSYNC's "It's Gonna Be Me" (2000).