Miley Cyrus has snubbed 'The Voice' because of Christina Aguilera.
The 'We Can't Stop' singer has reportedly turned down multiple requests to perform on the hit talent show due to her severe dislike of the 'Fighter' hitmaker who first appeared as a judge on the series in 2011.
Although the 33-year-old is currently on a two-season break from 'The Voice', Miley has refused to appear on the programme over its affiliation with Christina - who, like the 21-year-old, shot to fame as a young Disney star.
A source told RadarOnline.com: ''Miley is no friend or supporter of Christina, despite the fact they have a lot in common, including long associations with Disney and using some of same people through the years on their respective business teams.
''Even if Christina has temporarily stepped aside, The Voice is still Christina's show and Miley doesn't want to lift a finger to help that woman.''
'The Voice' bosses are reported to be upset by Miley's decision after they set their hearts on the star performing on the season finale.
The source said: ''Last month 'Voice' bosses made Miley another offer to have her perform on the finale show and Miley said no - and was very clear about her reasons!''
It is believed that Miley became angry after Christina commented on a pair of chaps she had worn on stage in February - which were similar to those worn by Christina in the video for her single 'Dirrty'.
Christina wrote alongside a picture of Miley in costume: ''Cheers from one dirrty girl to the next @MileyCyrus...wear em' loud & proud, girl-yes! (sic)''
The source explained: ''Miley couldn't believe Xtina would Tweet about her wearing chaps on stage, reminding everyone that she did it first. It was such a fake compliment and undermined Miley in the process.''