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.

Sabrina Carpenter is achieving all of her dreams. The singer is currently performing her "Sweet and Sour" tour; for one of her Los Angeles shows, she brought out one of her idols: Christina Aguilera.

Raise your hand if you’re feeling some serious FOMO for not being at Sabrina Carpenter’s Short n’ Sweet Los Angeles show on Friday night, where Christina Aguilera surprised the crowd, joining the pint sized popstar to delight the crowd with a duet.

Katy Perry and John Mayer recently had an unexpected run-in in Los Angeles. Perry, 40, and Mayer, 47, were spotted at Sabrina Carpenter’s Short n' Sweet Tour show at the Kia Forum in Los Angeles on Sunday7.

Pop star Katy Perry and ex John Mayer seemed to be having a friendly catch-up at a Sabrina Carpenter concert, a decade after their split. The exes were seated close to one another for the gig in Los Angeles on Sunday.