My friend loves kpop. She is obsessed with super junior and shinee. She hates ayumi. The only songs she likes by her are "Greatful Days x PARA ONE" and "Rule (80kidz's "No More Rule" mix)". The only thing I can say is that, ayumi (whether you like jpop or kpop) isn't for everyone.

That's really catchy xD
Also
"wow wow so wow wow
oh wow wow so wow wow
1.2.3.4 YOU and ME?" :luv2

@Picaflor: well duh no artists is for everyone. But its alwayss worth a try. I'm lucky one of my best friends is kpop (formerly vkei -although she still likes it-) obsessed. But somehow she likes her some ayu. But nobody else really XD

@aisubeki & yukas: that's why that the first song I would ever suggest. U just get hooked on it

It doesn't get catchier than that :luv2
STEP you is just too awesome and one of the ways I fell in love with ayu

Trauma!!!

the first thing stuck in my head :)

Then, goes to evolution and Fly High.

OURSELVES....
it's really catchy,,,,

i dont like k-pop..it sounds the same each other....

Am I the only one who finds Real me really catchy? My friends started to listen to ayu because of that song <3

^ OMG I forgot about Real me. This is a must-listen for your friend.

"Beautiful Fighters" was the first song that came to my mind. I think, it's reli catchy.

"Startin'" and "BLUE BIRD" are very catchy too...as are a lot of others!!

SURREAL
Connected
UNITE!
Voyage
Poker face ^^

Sparkle! It got me hooked on J-Pop due to the infectious "noh, noh, noh!" hook.