Oh!

A very popular girl group, Girls' Generation's new song, Oh! was another hit.
The song repeats by singing, "Oh oh oh oh oppa reul sa rang hae"
This song is basically saying that I love you.

Their concept is cheerleaders cheering on to their loves.
The group is made up of 8 young girls who dance well, sing well, and are very pretty.

Maybe this is why lots of young and old men are fans of this group.

At first, I didn't like this group because they weren't good at singing and they didn't have any specific color in themselves. They were like others; similar kinds of songs, similar dances, and similar looks. This is why I didn't like them, but as time went by and they showed their 'real-self' on TV by acting as they were not on TV. This was the reason I started to find interest in them.

I really liked their 1st single, Gee.
This song is a bit similar to Oh! because they are also expressing 'surprise'.

They can't be called as the 'best' because even though they have been on air for a few years, it wasn't a long time and they aren't perfect to say 'best' because that is not being humble.

If they keep these skills of dancing and if they become more humble, I think they will become more popular with a lot of interest from girls, too.

Good luck!