Justin Timberlake Photos

Justin Timberlake says John Mayer is the love child of Macy Gray and a bear.

Justin was about to launch into an impression of the 'Gravity' singer when he likened John's vocal talents to a cross between Macy and a growling bear.

Appearing on the premiere of US talk show 'Late Night with Jimmy Fallon', Justin - who is good friends with John - said: "I imitate stars because I love them. How would I describe John Mayer? He sounds like if Macy Gray and Smokey Robinson, or actually, Smokey the Bear had a love child."

I imitate stars because I love them. How would I describe John Mayer? He sounds like if Macy Gray and Smokey Robinson, or actually, Smokey the Bear had a love child.

He then launched into a rendition of John's hit 'Daughter' with a live band, while the audience whooped and cheered.

Justin went on to joke about John's singing style, claiming the key to doing a good impression of the 'Gravity' singer was practicing your "solo face".

He explained: "He has the most amazing solo face. He contorts his face, it's like literally his tongue takes over."

The 'SexyBack' singer's impression of John left fellow guest Robert De Niro in hysterics.

This is not the first time Justin has impersonated another star.

Last year, he appeared on US talk show 'Saturday Night Live' where he performed a comedy version of Beyonce Knowles' hit 'Single Ladies'.

The 28-year-old singer donned a skin-tight leotard and high heels and performed an energetic dance routine in a spoof of the video to the song.