Throughout his interview on The Howard Stern Show, record producer and music executive Jimmy Iovine told Howard one reason he’s achieved so much success was his willingness to “be of service” to the many, many stars he’s worked with — acts like John Lennon, Bruce Springsteen, Stevie Nicks, Tom Petty, Dr. Dre, Elton John, and Gwen Stefani (just to name a few).