Karl Martin Sandberg (born February 26, 1971), better known as Max Martin, is a Swedish music producer and songwriter. He rose to prominence in the second half of the 1990s after making a string of major hits for artists such as the Backstreet Boys, Britney Spears and NSYNC. Some of his earlier hits include "I Want It That Way" (1999), "...Baby One More Time" (1999) and "It's My Life" (2000).

In 2016, Martin won the ASCAP Songwriter of the Year award for the sixth consecutive year and for the ninth time in his career.

Martin worked with Avril Lavigne on two songs, "Alone" and "I Will Be", which were released on some deluxe editions of Avril's third studio album The Best Damn Thing (2007). Martin also worked on four songs for Avril's fourth studio album Goodbye Lullaby (2011): the three singles "What the Hell", "Smile" and "Wish You Were Here", and the album track "I Love You".