Ralph's Italian Restaurant/Facebook

Taylor Swift gave the head chef at a Philadelphia restaurant two big surprises last week.

The singing sensation turned up at Ralph's Italian Restaurant on Friday with tour mates, Ed Sheeran and Austin Mahone, and her entourage for a post-concert late-night dinner.

Right away, the chef called his mother. "She wanted me to take a picture because she is a big fan," he told E! News .

"My son has autism, and while I'm at work my mom and my son love to listen to her music. He loves her music!" he added.

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Not only did Swift pose for photos, she shocked the chef by handing him two tickets to her concert the following night.

"It was so kind-hearted of her," the chef gushed to E!. "My son is 11. It was my son and I's first concert we've ever been to! It was really special."

And there was more. The chef told E! News that Swift left a $500 tip following her meal of chicken parmesan.

According to Philadelphia food blog, Foobooz, the bill came to $800, which would make Swifty's tip a hefty 62.5 percent.

"From her graciousness upon arrival for us staying open, to the extremely generous tip before leaving, she was a pleasure to have dine with us!" the restaurant wrote on its Facebook page. "Probably the biggest celebrity to visit Ralph's in recent memory!"

@taylorswift13/Twitter