Sabrina Carpenter‘s Short n’ Sweet Tour concert in Los Angeles became even more special with Christina Aguilera’s surprise appearance. On Friday, the “Espresso” singer welcomed Aguilera at L.A.’s Crypto.

The singer celebrated the end of the US leg of her concert series with a festive mini — and bundled up with an affordable Aritzia coat.

Fresh from being nominated for half a dozen Grammy Awards, the 25-year-old pop star brought her tour behind this year's "Short n' Sweet" to Los Angeles on Friday night.

"This right there ladies and gentlemen, this is a hottie with substance," said Carpenter while singling out Qualley, who starred in 'The Substance'

At Crypto.com Arena on Friday, Carpenter delivered a concert worthy of her place as one of biggest pop stars of the year. She now moves to the Kia Forum in Inglewood for concerts on Sunday and

Christina Aguilera made a surprise appearance at Sabrina Carpenter's concert at the Crypto.com Arena in Los Angeles on Friday, Nov. 15 to duet a pair of her hit songs, 'Ain't No Other Man' and 'What a Girl Wants.

Aguilera, 43, strutted into the venue, wearing a black bustier and over-the-knee silver boots while performing a vocal riff that launched a rendition of “Ain’t No Other Man.” Carpenter, 25, subsequently joined her at center stage to complete the number, per social media footage. They also sang Aguilera’s “What a Girl Wants.”