A possible concise summary is:
Regina is heartbroken after Daniel rejected her and started dating Ally. Her friends try to cheer her up by giving her a makeover, dancing to K-pop songs, and singing emo songs. They also help her get rid of Daniel's things and move on. Regina realizes that she can be happy with her friends and that it's okay to be sad sometimes.
Here are the key facts extracted from the text:
1. Regina locked herself in her room after being rejected by Daniel.
2. Regina's friends tried to help her get over Daniel by cleaning her up and changing her appearance.
3. Daniel has a new girlfriend and Regina is struggling to cope with the breakup.
4. Regina's friends tried to cheer her up by learning a K-pop dance routine.
5. Regina started to feel better and more confident after dancing and singing with her friends.
6. Regina's friends threw away Daniel's belongings to help her move on.
7. Regina wrote and performed an emo song to express her emotions and move on from Daniel.
8. Regina and her friends formed a band and performed a song together.