Background music in The Wolverine

While watching The Wolverine with friends on Saturday, I caught a bit of Hello!Project music in the background about an hour in. When Logan tracks down Noburo to question him, he finds him partying with two European girls, and this is their sexy party music:

(for a brief moment, I misidentified it as Sade; I really hadn’t noticed the stylistic similarity before)

Oh, by the way, this being an H!P group (the 2005 shuffle unit Sexy Otonajan (“Sexy Grownups?”)), two of the girls are 12 years old, with heavily padded bras.