Can someone please tell me why the chorus to Bon Jovi’s song "It’s My Life" suddenly, and quite randomly, I might add, started playing in my head and is now stuck there like bubble gum on a the soles of my Nikes?

And, of course, I don’t have it in my iPod. So now I’m sitting here workin’ away while under my breath I’m humming/growling, "It’s my life….It’s now or never …. hhmmmmm gonna live forever… I just want to hmm-hmm-hmm while hmm-hm-hmmmm…It’s my life… My heart is hmm-hmm-hmmm…hmmm-hmmm…I did it my way. I just wanna live while I’m alive… It’s my life…." Repeat and rinse. It’s been ages since I heard this song, and now I can’t think of anything else but. It’s gonna be a long afternoon till quittin’ time.

PS — For all those who don’t speak "hum," here’s the real version:

It’s my life
It’s now or never
I ain’t gonna live forever
I just want to live while I’m alive
(It’s my life)
My heart is like an open highway
Like Frankie said
I did it my way
I just wanna live while I’m alive
It’s my life