Martin Karl Sandberg (born February 26, 1971), known professionally as Max Martin, is a Swedish music producer and songwriter. He broke through as a producer and songwriter in the mid-1990s after crafting a string of hits for pop artists like Ace of Base, E-Type, the Backstreet Boys, Britney Spears, 'N Sync and Robyn. Some of his earlier hits include "Quit Playing Games (With My Heart)", "...Baby One More Time", and "It's My Life".
His trademark during the second half of the 1990s and the early 2000s was a danceable, keyboard-laden pop sound that blended music styles such as funk, heavy metal and europop. However, with Kelly Clarkson's 2004 hit "Since U Been Gone", Martin stepped back into the spotlight after reinventing himself with a heavier, rock-tinged sound.
Since 2008, he has written and co-written 13 number-one hits, including "So What" by Pink, "I Kissed a Girl" and "Part of Me" by Katy Perry, and "My Life Would Suck Without You" by Kelly Clarkson. Since 2010, he has co-written ten top-10 singles, including "Dynamite" by Taio Cruz, "DJ Got Us Fallin' in Love" by Usher, "Whataya Want From Me" by Adam Lambert, "F**kin' Perfect" by Pink, "Hold It Against Me" by Britney Spears and the most recent "We Are Never Ever Getting Back Together" and "I Knew You Were Trouble" by Taylor Swift which become a worldwide success and "One More Night" by Maroon 5.