Adele is in talks for a two-year residency in Las Vegas.

The 'Set Fire to the Rain' hitmaker, who is currently working on her new album after taking time off to raise her two-year-old son, Angelo, has reportedly sparked a bidding war between several hotels, including the MGM Grand Hotel & Casino, The Venetian and Caesars Palace, and is in line to ink a $40 million deal.

A source told In Touch Weekly magazine: ''The demand for Adele is off the charts.

''Everyone is dying to see her perform again. This could be the biggest deal ever put together.''

The British singer, 27, hasn't toured in almost four years after being forced to cancel a series of shows in the US in 2011 due to vocal issues.

The 'Skyfall' singer was expected to bring out her third LP - the long-awaited follow-up to 2011's '21' - this spring but the release has been pushed back again following a number of delays.

A source previously said: ''The album is currently scheduled for release in September.

''The most recent plan was for it to hit shops before the summer but that's now been scrapped. Adele's taking her time to make sure the album is perfect and doesn't want to compromise.''