Of course, we can't forget Stellar! Once the girls donned their see-through stockings and super tight one-piece tops, fans went wild. Too much or too little? You decide.

SISTAR is a sexy group, so you can expect to see some sexy outfits. However, that doesn't mean we want to see everyone's panties.

HyunA is another queen of all things sexy. However, she was highly criticized many times for going over the limit with her sexual outfit concepts. To each his/her own.

The members of Girl's Day quickly flipped the switch and dropped the cute act once they meet with success after "Expectation." Now, they are pushing the barrier with nothing but sexy concepts and "Ring My Bell" seemed to be their first step into showing off skin in a not-so-glamorous way.

The girls of SECRET rocked the K-Pop scene when they got a little more revealing in songs like "Poison." Sadly, it seems K-Pop is becoming a competition of who can show off the most skin without getting banned from the stage.

Nine Muses are another group to go a bit too far with their tight, revealing clothing. "Wild" was just one example. From the MV to the stage, the girls showed off their stuff with confidence. On many occasions, fans saw a bit too much then they had anticipated (Google it for yourself NSFW).

Forget coming inside for some tea, Hello Venus want you to drop it like it's hot all night long with "Wiggle Wiggle." The concept was out of the blue and definitely serialized the girls' bodies; especially with those outfits.

During their "Like A Cat" promotions, member Seolhyun seemed to be grabbing everyone's attention - but not in a good way. Her short, one-piece leather outfit had either fan's jaws' dropping or in a complete fit. Either way, all the members were showcasing their assets that day.

When BP RaNia (originally RaNia) debuted, they were by far the biggest shock-factor at the time. Their concept was beyond sexy and their clothes were something straight out of '50 Shades of Grey.' Which explains why they had limited promotions for "Dr. Feel Good." A pity, in my opinion.

The girls of I-Ren are another group with a shocking debut concept. While they can sing quite beautifully, it seems their title song "Butt" was living up to its name as this extremely sexual performance was all about their butts and that's about it.

Another queen of sex appeal, Ga In let nobody stop her from showing off her body for her "Paradise Lost" promotions. She brought a whole new meaning to the word temptation as she glides across the floor in her sheer bodysuit.