Taylor Swift's "1989" tour has welcomed a lot of stars over time, with supermodels like Karlie Kloss, fellow singers like Mary J. Blige, even comedians, athletes, and tons more.

However at the show in Los Angeles on Monday Night, two things made an even bigger buzz.

The first was Ellen DeGeneres, who according to Time Magazine, Taylor introduced as an "international pop superstar".

It's not often that one can upstage Taylor Swift, but if Ellen's sequined getup says anything, it's that Ellen can hold her own on the runway.

The second buzz happened at the end of the show, when she mouthed "I love you" to her boyfriend, who was in attendance.

Sure, Taylor already wore his gray T-shirt to a meet and greet, proving that they've taken things to the next level. However, things were even sweeter at Monday's performance.

Taylor's DJ and music producer boyfriend was spotted at the end of the runway of the show as his girlfriend took her bow.

As it turned out, according to E! News, he was in the perfect location for Tay's unforgettable finale.

The 25-year-old performed her smash hit, "Shake it Off" and after the performance, she mouthed three words to him: "I love you."

It was a small gesture, but it seems like this is a "Love Story" to look out for.

It's Tay and Calvin against the world, especially after he defended her when One Direction's Zayn Malik dropped some serious shade on Twitter.

The lovebirds have only been dating since February, but it seems that things are going well for them, with news of an upcoming engagement coming, too!

According to a source from Life & Style, Calvin has already started looking for rings.

The source for the magazine shared, "Taylor loves chunky rings, so he wants to go big. He's looking at cushion-cut center stones and is willing to drop at least $500,000!"

And Tay would say yes. A source for Hollywood Life said, "She's just so happy with him. Taylor doesn't think it's a sure thing, she's not that cocky, but she has a really good feeling that they will end up together."

With her latest performance, it seems that they have forever in the stars, too. After all, she may say it a lot to her fans, but Tay does not usually declare her love for her beaus on stage. Do you think Taylor and Calvin will make it to the altar one day?