My Money’s On:
Mir "Bitch" by Meredith Brooks.
Maryanne "Bad to the Bone", by George Thoughgood
Lauren Ooooh! I know! I know!! "Living Dead Girl" by Rob Zombie! I think it would be the perfect combination of creepy lyrics and pure intimidation.
Mary Battery by Metallica
Jelly Smack My Bitch Up. Because really, it's perfect in so many ways.

L.L. had no idea he was writing an anthem for mommies:
Surcie LL Cool J’s “Mama Said Knock You Out”
Mother Goose Mouse Mama Said Knock You Out - LL Cool J

Hey, it worked for Rocky:
Buffi The theme from Rocky of course! Well, Now that I think about it some of my mightiest battles have occurred with lullabies in the background, so I may have to rethink that.
Barbex I so do not care about boxing, hmm "Eye ot the tiger " probably
ishouldbeworking Eye of the Tiger (of course)

Making it personal:
Sleepless Mama Love is a Battlefield
Jill Miller Zimon The Police: Do Do Do De Da Da Da (That's all I want to say to you)
Holli Obviously the Evil Holli Themesong.. a/k/a "Kashmir" by Led Zeppelin
EverydaySuperGoddess "I Want a Cookie," from Evolution Control Committee's Plagiarhythm Nation album, of course.
Carmen I wanna be sedated - the Ramones.

Not buying the scenario:
Lin Okay, so this is assuming I’m a boxer which is pretty far-fetched, but… Definitely would love to hear Freddie Mercury singing “We are the Champions.” I can't imagine anyone not choosing this song. It always gets me going. Since it’s “We are the champions” instead of I am a champion, you’d think it wouldn’t work, but the first verse is definitely in the first person.
cmhl Now THIS is a likely scenario--- but IF I were to engage in a world-class boxing championship, I would surely have lost my mind, so I might choose "They're Coming to Take Me Away"—Napoleon the 14 th…

Likely to get KO’d, but look fabulous doing it.
Mazeway I'm going to go with the original theme to Sesame Street. Very bouncy. And you should know that this is the question that caused the most thought. My husband wanted me to hold off so that he could help me come up with the perfect answer. But I'm going with my gut here.
Summer "I Feel Pretty," from West Side Story. I'd wear lots of lipstick, andinstead of a satin robe, I'd wear a hand-embroidered apron.
Jenijen If I am the one boxing? Help, by the Beatles
Eulallia Don't you think "The Rainbow Connection" would put everyone in such a friendly mood? :)