"Leaving on a Jet Plane" is by the... Mamas And The Papas
I really like that song, as well as "steam powered Aeroplane" by the... Soggy Bottom Boys (yes, it's bluegrass style)
Oh, and I ended up with an MP3 player... I do the whole 1 earbud in an ear thing as well. We don't use MP3 players etc anytime we are below 10,000 ft, but that's not really practical in a Cessna. Many of the new headsets have an input jack for an MP3 player, in that case you are the only one who can hear it (doesn't do anything for the passengers). Many of the captains I fly with have that style of headset and almost all of them take advantage of it to listen to music. Usually it's the ANR headsets that have the input jack and the jack will be with the ANR controls in the cord. I have "poor man's ANR" and just put earplugs under the headset and turn everything up louder...