The following tickets are on sale beginning Friday, December 18th, 2009:

Carrie Underwood:

What: North American dates

When: March – May

Tixs: Price varies depending on location

Buy: Ticketmaster.com at 10:00 AM EST

Mariah Carey:

What: North American dates

When: January – February

Tixs: Price varies depending on location

Buy: Ticketmaster.com at 10:00 AM EST

Rihanna:

What: U.K. dates

When: May

Tixs: Price varies depending on location

Buy: Ticketmaster.co.uk

Ted Leo & the Pharmacists:

What: North American dates

When: March – April

Tixs: Price varies depending on location

Buy: Ticketmaster.com at 10:00 AM EST

Timbaland:

What: North American dates

When: January – February

Tixs: Price varies depending on location

Buy: Ticketmaster.com at 10:00 AM EST

Yeasayer:

What: North American dates

When: April – May

Tixs: Price varies depending on location

Buy: Ticketmaster.com at 10:00 AM EST

TAGGED AS: Carrie Underwood, Mariah Carey, Rihanna, Ted Leo & The Pharmacists, Timbaland, Yeasayer