Chris Brown and Rihanna are planning to spend thousands on phone-bills while he is on tour.

The 23-year-old 'Turn Up The Music' singer - who will begin performing overseas for several weeks later this month as part of his new tour - is reportedly prepared to spend whatever it takes to keep his 24-year-old girlfriend feel special while he is away.

A source close to Chris told HollywoodLife.com: ''[Chris will] miss Rihanna. I know they will talk all day and text back and forth. Then, [he's] going to get back home and have a $5K cell bill. It's cool though. To him, Ri's worth a whole lot more, so he ain't tripping.''

But the couple - who recently reunited despite the fact he is still on probation for beating her in 2009 and recently celebrate Halloween together - are planning to spend as much time together as possible before he leaves.

The insider said: ''That's his girl and they're talking and trying to squeeze in as much time together as possible before he jets out of here.''

Chris - who is still under supervised probation for his assault on the 'Diamonds' singer - is scheduled to begin a large tour that spans several countries in Europe and South Africa on November 14.