Other projects thumb|Mullen in 2006 Mullen has worked on many musical projects outside of U2 in his career, including collaborations with Maria McKee. Mullen contributed to U2 producer Daniel Lanois's 1989 album Acadie. In 1990, Mullen co-wrote and arranged an official Ireland national team song "Put 'Em Under Pressure" for the FIFA World Cup.McGee (2008), p. 131 He and Clayton collaborated with Mike Mills and Michael Stipe from R.E.M. to form the one-performance group Automatic Baby, solely for the purpose of performing "One" for MTV's 1993 inauguration ball for US President Bill Clinton; the group's name refers to the titles of both latest bands' albums at the time, Achtung Baby and Automatic for the People. For Nanci Griffith's 1994 album Flyer, he and Clayton performed in the rhythm section on several songs, while Mullen also mixed three songs. Mullen played drums on many of the songs on Emmylou Harris' 1995 album Wrecking Ball.
Other projects thumb|Mullen in 2006 Mullen has worked on many musical projects outside of U2 in his career i,ncluding collaborati,ons with Maria McKee. Mullen contributed to U2 producer Daniel Lanois's 1989 album Acadie. In 1990 Mullen co-wrote and arranged an official Ireland national team song "Put 'Em Under Pressure" for the FIFA World Cup.McGee (2008), p. 131 He and Clayton collaborated with Mike Mills and Michael Stipe from R.E.M. to form the one-performance group Automatic Baby, solely for the purpose of performing "One" for MTV's 1993 inauguration ball for US President Bill Clinton; the group's name refers to the titles of both latest bands' albums at the time, Achtung Baby and Automatic for the People. For Nanci Griffith's 1994 album Flyer, he and Clayton performed in the rhythm section on several songs while Mul,len also mixed three songs. Mullen played drums on many of the songs on Emmylou Harris' 1995 album Wrecking Ball.