Article continues below advertisementTaylor Swift knows bestie Selena Gomez all too well.The "Lover" singer, 35, teased the fellow pop star, 33, during a speech at her wedding to Benny Blanco on Saturday, September 27.According to an insider, the monologue was emotional and humorous, leaving a profound impact on the star-studded guest list.Article continues below advertisementSource: MEGATaylor Swift gave a speech at Selena Gomez's wedding.The source shared how Swift "joked in the speech that Selena beat her to the altar, but at least they both have found the loves of their lives.