Donut shops are not normally known as live music destinations. But Jimmy Kimmel switched things up for shoppers at a local donut spot across from his studio on Hollywood and Highland in Los Angeles, setting up hidden cameras and getting his guest Christina Aguilera to sing her most famous songs over the loudspeaker to surprise customers with personalized lyrics — all delivered in her famous voice. To the tune of “Genie in a Bottle” — the hit that made Aguilera a star over two decades ago — she delivered customized verses to shoppers as they perused the donut offerings. “There’s a guy in all denim, and he also has a wallet chain.