Leona Lewis will also tour the UK this year

Leona Lewis is to support Christina Aguilera on her US tour.

The X Factor 2006 winner will open for the singer in cities including Boston, Chicago and San Diego.

We can now confirm that Leona will join Christina Aguilera on the North American leg of her Bionic world tour,' reads a statement on her website.

Leona will perform at twenty dates across the US and Canada beginning in Connecticut on 15 July.'

Tickets go on sale from 21 May.

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