Award-winning American songstress Taylor is currently on British soil as part of her Red tour and is performing five shows this week at London's O2 Arena.
She was pictured rocking out on stage yesterday (2 February) with a glittery red guitar and sporting a pair of high-waisted black hot pants, which she teamed with a cool white shirt and red lipstick.
But the real treat of the evening, beside seeing Taylor give her all on the guitar, was a surprise performance from the UK's very own rising star Sam Smith, who sang his new track 'Money On My Mind'.
And it sounds like 21-year-old Sam was just as excited about his appearance at the concert as his fans were.
He tweeted: "I just got invited on stage to sing 'money on my mind' with @taylorswift13 at the O2!!!!!!!!!!!!!!!!!! Dying".
The Brit Awards nominee then posted a photo of himself with Taylor on Twitter and wrote: "Thank you so much to the gorgeous @taylorswift13 for singing 'money on my mind' with me tonight at the O2!! "
His snap shows Taylor wearing another pair of teeny tiny shorts, as well as a sparkly black top.
And is it merely a coincidence that Sam is wearing the colour red? Maybe it's a requirement for all artists taking part in the Red tour!
Although it's clear to see that the British singer had a blast yesterday night, it seems Taylor was also eager to meet Sam and she couldn't help but shower him with praise after he serenaded her crowd.
Taylor tweeted: "Tonight at the O2, @samsmithworld sang my new favourite song "Money On My Mind" and smashed it! You need this song/artist in your life!"
Over the weekend she was also joined on stage by UK chart-topped Ed Sheeran, who supported her on tour across the States last year.
Are you a fan of Sam Smith? Check out his lyric video for 'Money On My Mind' below and tell us what you think, as the best comment from across the website each week wins £50!
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