After further thinking:
I just realized that my "Walk Away" guess was incorrectly attributed to Joe Walsh (solo) -- should have written The James Gang. Doesn't matter, that's probably not the right answer -- since, as explained below, I think National Acrobat and Shadow have the two correct guesses thus far. So, I'll guess (for the "nothing to see here, move along" clue) the Beatles' "Let It Be."
I also just realized that National Acrobat's "Born To Be Wild" guess is almost certainly the correct guess for the "Have I got a helmet?!" clue, which based on a Google search is a line often (mis?)attributed to Jack Nicholson in the movie Easy Rider. (Though he doesn't actually say it, at least in the clip I saw.) It could also be "The Weight" by The Band, which is also in that movie (and a much better song).
I haven't made a guess for "a card" because I'm fairly sure Shadow got it right with "The Joker."
Other possibilities for the ad slogan clue, since no one else has guessed them yet: "Come Together," which supposedly was written by John Lennon based on Timothy Leary's gubernatorial campaign slogan, and "Paint It, Black," which Apple used for the black iPod a few years back. I like both of these guesses better than my original guess of "Like a Rock", though a list of classic rock songs needs at least some Bob Seger in it!