wet seal song

i heard this song in wet seal a little while ago; and the song sounded sorta old – like 90s maybe. neways, it sounded like (a) young girl(s) btwn ages 15-20 or guys that havent hit puberty – prolly not thou. heh… it sounded pretty much like a younger girl group. in what i believed was the chorus, they were saying “these are the days we will never forget (hey!).” i’d say the genre is prolly like 90s-2000s pop music. …idk, it was kinda catchy after awhile and started 2 grow on me; cuz i had it in my head after we left. but neways, i need some help. ne-one have an idea what song this might be and who it’s by???