Taylor Swift: making dreams come true since 1989. 

Not only has the singer been wowing fans around the world as she continues her latest tour, but she also surprised two very important Swifties this week in her famously generous fashion. 

Jacob Velazquez, a 7-year-old piano prodigy who was diagnosed with Autism three years ago, performed an impressive medley of the pop star's songs on the piano—the evidence of which was uploaded to YouTube as well as the autism advocacy organization Autism Speaks

"I'm your biggest fan and I hope you can sign this for me one day," Jacob says in the video, holding up a copy of Swift's most recent album. "I hope we can jam and I can play something for you and it goes something like this."

WATCH: Taylor Swift sings "Ronan" in concert

Taylor Swift

Michael Loccisano/Getty Images for TAS

Swift quickly got wind of the viral video and the "Shake It Off" stunner tweeted at Jacob, personally inviting him to her concert in addition to offering a meet and great. 

"@JacobsPiano I HAVE to give you a hug for that beautiful piano medley you did! Please come to a show on my tour and say hi to me? My treat," the charitable songstress wrote

His adorable response? "Thank you so much @autismspeaks!!!!! I can't wait to meet @taylorswift13!!! #BestDayEver." 

But that's not all Guardian Angel Swift has accomplished this week. She also met 26-year-old fan Tiffany Rich, who has cystic fibrosis and is currently waiting for a double lung transplant, at her San Francisco concert on Saturday after Rich posted a photo which caused the hashtag #Lungs4Tiff to go viral. 

PHOTOS: Taylor's best looks

"I cried tears of joy," Tiffany told the NBC Bay Area affiliate of her reaction after she received a call from Taylor's team. "My dream was going to come true because of all the love and support of people retweeting, reposting, and sharing my photo. It was a feeling that I could never describe."

"This was the best day ever," Rich, who met Swift with her best friend, added. "So when I met Taylor it was for a few minutes, but that was all the time I needed. I had butterflies in my stomach before I went in there. When I saw her I gave her a big hug and talked to her about my post."

All hail Queen Taylor! 

PHOTOS: Taylor Swift's fierce concert looks

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