THE BACHELOR – “Episode 1804” – “K-Pop” superstars “2NE1” put Juan Pablo and six of the women through their paces, teaching them a choreographed routine to one of their chart-topping hits. Kat steals the spotlight with her professional dance moves, while Nikki struggles to keep up and fit in. Then the group drops a bombshell — Juan Pablo and the six beautiful women will perform as background dancers during a concert in front of a live audience. Kat has no problem showing off her expertise and making sure Juan Pablo knows it. Nikki has a serious case of stage fright she must conquer if she is to continue. At the after party, one woman makes it quite clear she is not a fan of group dates and wants Juan Pablo all to herself, on “The Bachelor,” MONDAY, JANUARY 27 (8:00-10:01 p.m., ET), on the ABC Television Network.