David Gunnar Fransiscus Lagercrantz, born 4 September 1962, is a Swedish journalist and best-selling author, best known as author of Zlatan Ibrahimović's biography I am Zlatan Ibrahimović.
The track "Don't Speak (I Came to Make a Bang!)" was featured in a 2008 Nike commercial directed by Guy Ritchie, which included the likes of Zlatan Ibrahimović, Cristiano Ronaldo, Cesc Fàbregas, and Ronaldinho and is also featured in the 2006 video game Need for Speed: Carbon
Frans that was the biggest summer hit of 2006 in Sweden and was a praise of soccer player Zlatan Ibrahimović.
In 2004, Tony Ernst criticized Swedish journalist Jan Majlard for several attacks on the Swedish soccer star Zlatan Ibrahimović, including a personal attack where Majlard compared Zlatan with Mike Tyson.