A legendary duet just happened at the Los Angeles Staples during Swift's 1989 World Tour concert last Tuesday, Aug. 25, 2015. 

John legend was supposed to watch the concert of Taylor Swift that is until Taylor found out that he was coming to the show - Taylor simply asked John Legend if he could have a duet with her and he definitely said yes! By the looks of it, fans can only assume that John Legend loves all of Taylor!

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Taylor just keeps making calls to all the best singers, actors, and performers to be her surprise guests at her 1989 World Tour performance. All this because she just wants to make her fans happy. It's her way of giving back to her fans for all the support they have given her through all the years.

A lot of famous personas have already joined her on stage including Alanis Morissette, Natalie Maines, Ellen Degeneres, Matt LeBlanc, Uzo Aduba, Chris Rock, and Kobe Bryant. 

However, it wasn't all great as some fans were allegedly expecting Jay-Z and Beyonce to show up on stage. Surprisingly, the couple didn't show up. Some fans couldn't hide their disappointment and even shared their comments on Instagram. 

Instead of having the rapper and Queen B on stage, she welcomed the Indie duo, Beck and St. Vincent to sing with her. While the indie duo might not have been enough, having John Legend sing "All of Me" with her on stage made the concert a delightful one.

Taylor was very relieved to have John Legend say "yes" to her short notice invitation. John Legend serenaded Taylor Swift and the audience with his hit song.

Taylor Swift's concerts have been really a great experience for her fans and it's a double treat as her concerts were full of celebrity guests.

Tagstaylor swift, John Legend