AEROSMITH frontman and "American Idol" judge Steven Tyler attended Boston Common magazine's summer bash this past Wednesday at the House of Blues in Boston, Massachusetts. The rocker wore a Boston police motorcycle helmet and wailed, "I'm baaaaaaaaaaaaaack," on the red carpet. He even took time to serenade TV reporter Sara Underwood's baby bump with "I Don't Want to Miss A Thing".Regarding "American Idol", Tyler told BostonHerlad.com, "It's been major separation anxiety. 'Idol' was quite intense this year, and I got so much pleasure out of being a part of it. They were all good before I met them, and they're even better now." When asked what he missed while on hiatus, he said, "I miss Randy's [Jackson] humor, Jennifer's [Lopez] jokes, and Marc, her husband. I miss them all. We're one big family there, you know?"