on the iPod:

a1,aaliyah, aaron carter, ace of base, adam lambert, aerosmith, alanis morisette, alesha dixon, alicia keys, all saints, anggun, all-american rejects, anna nalick, aqualung, ashley tisdale, the taris, atlantic starr, augustana, b.o.b, avril lavigne, rivers cuomo, bsb, the beatles, belinda carlisle, beyonce, blessed union of souls, blue, bon jovi, boy meets girl, boyzone, britney spears, bonnie taylor, bryan adams, the calling, celine dion, chad kroeger, chicago, chris brown, cindy lauper, christina aguilera, cleopatra, coldplay, the corrs, daniel merriweather, danial powter, the cranberries, david craig, the darkness, dashboard confessionals, dido, diana ross, delta goodrem, don henley, donna lewis, duffy, eagle eye cherry, eminem, europe, enigma, enrique iglesias, fabolous, evanescence, fall out boy, tania, ciara, sarah brightman, fisher, five for fighting, flo-rida,timbaland, neyo, fm static, foo fighters, franz ferdinand, gabrielle, get cool, glee, goo goo dolls, good charlotte, gwen stefani, green day, hanson, hellogoodbye, haley james scott, hilary duff, incubus, jakaranda, james blunt, james morrison, jars of clay, jason derulo,janes addiction, jason mraz, jay-z,jay sean, jennifer lopez, jennifer paige, jesse mccartney, jet, jewel, jimmy eat world, john mayer, john rzeznik, jon secada, jordin sparks, journey, justin timberlake, karyn white, kasabian, katy perry, kesha, keane, kelly clarkson, keri hilson,kevin rudolph, the kooks, the killers, kings of leon, kris allen, david cook, kylie minogue, lady gaga, lady antebellum, leann rimes, lee ann womack, lene marlin, letters to cleo, leona lewis, lfo,lifehouse, lilly allen, linkin park, ll cool j, lmfao, lostprophets, lykke li, m2m, madonna, maino, mandy moore, manic street preachers, mariah carey, mario, maroon 5, marky mark and the funky bunch, martina mcbride, matchbox 20, matt nathanson, melanie c, michael bolton, michael buble,michael jackson, michelle branch, mika, mims, monica, muse, nsync,natalie imbruglia, nelly furtado, no doubt, norweigian recycling, o.a.r, oasis, one republic, our lady peace, owl city, paramore, phill collins, pat monahan, paula cole, pink, pixie lott, placebo, the pretenders, queen, radiohead, the rembrandts, remy zero, rick price, richard marx, rick springfield, ricky martin, rihanna,rob thomas, robbie williams, ronan keating, roxette, samantha mumba, savage garden, sarah mclachlan, the script, seal, sean paul seconhand serenade, selena, shania twain, shayne ward, shontelle, simply red, sisqo, sixpence none the richer, sophie b hawkins, soul asylum, spice girls, splender, spandau ballet, starsailor, the strokes, sugababes, susan vega, taio cruz, taking back sunday, tamar kaprelian, texas, taylor swift, third eye blind, tlc, tokio hotel, train, travis, trisha yearwood, tyler hilton, u2, usher, vanessa carlton, vengaboys, vertical horizon, wilson phillips, yellowcard, 3 doors down, 5ive..

And this is just 1. Have yet to add in those in my other 2 iPods.