Melissa McCarthy crashes Christina Aguilera's Carpool Karaoke

It may have been Christina Aguilera's Carpool Karaoke, but Melissa McCarthy still made sure she was heard when she appeared in the backseat of James Corden's car.

The actress has worked with Christina Aguilera before for the film 'Life of the Party', and showed off her skills when she jumped into the rap for Christina's hit 'Dirrrty'.

Melissa and James also got some diva lessons from Christina herself, bedazzled microphones and all.

Watch the extended version of Christina's Carpool Karaoke in the video above.