The song "It's All Over" from the musical film "Dreamgirls" explores the deterioration of relationships within a music group. The lyrics reveal a heated argument between Effie, Deena, and Curtis, as well as the involvement of other characters like Lorell, C.C., and Michelle.

Effie's lines in the song express her feelings of betrayal and abandonment. She believes that Curtis no longer loves her and accuses him of favoring another woman who she doesn't consider to be special. Effie feels dismissed and hurt, which leads her to retaliate against Curtis and Deena.

Deena confronts Effie for blaming others and not taking responsibility for her own actions. She claims that she has endured Effie's complaints, nagging, and constant screaming for too long. Deena believes Effie is self-absorbed and always puts herself first, causing problems within the group.

Lorell also expresses her fatigue with Effie's behavior, stating that she is tired of the problems Effie causes. She wants Effie to stop fighting and recognize the impact her actions have on the group as a whole.

As the argument escalates, Effie accuses C.C. of betraying her as well. She is angry and feels abandoned by everyone, including her closest friend.

Ultimately, Curtis decides to remove Effie from the group, intending to buy her out and replace her. This decision further highlights the tension and irreparable damage done to their relationships.

The repeated phrase "It's all over" emphasizes the end of the unity and harmony within the group. Each character involved recognizes that their time together has come to an end, and Effie's refusal to accept this reality adds another layer of stubbornness and defiance to the song.