Recording Studios, Hollywood, California; Big Fish Studios, Encinitas, California Mixed at Conway Recording Studios, Hollywood, California; South Beach Studios, Miami, Florida Personnel Blink-182 Mark Hoppus – bass guitar, lead vocals, songwriting Tom DeLonge – guitars, backing vocals, songwriting Travis Barker – drums, percussion Additional musicians Roger Joseph Manning Jr. – keyboards Production Jerry Finn – production Tom Lord-Alge – mixing engineer Sean O'Dwyer – recording engineer Darrel Harvey – assistant engineer John Nelson – assistant engineer Robert Read – assistant engineer Mike Fasano – drum technician Rick DeVoe – management Gary Ashley – A&R Brian Gardner – mastering engineer Mashup version Credits adapted from the YouTube video for "What's My Age Again?" / "A Milli". Barker is credited with songwriting on this edition, as opposed to his original credits for Enema of the State. Personnel Blink-182 Mark Hoppus – bass guitar, lead vocals, songwriting Matt Skiba – guitars, backing vocals Travis Barker – drums, percussion, songwriting Additional musicians Shondrae Crawford – songwriting Tom DeLonge – songwriting Kamaal Ibn John Fareed – songwriting Ali Shaheed Muhammad – songwriting Lil Wayne – rap vocals, songwriting Production Matt Malpass – engineer Rich Costey – mixing engineer Chris Athens – mastering engineer Charts and certifications Weekly charts Year-end charts Certifications References Footnotes Sources External links 1999 singles 1999 songs Blink-182 songs Music videos directed by Marcos Siega Songs written by Mark Hoppus Songs written by Tom DeLonge MCA Records singles