Blackberry in bed!

Pop superstar MADONNA and her husband GUY RITCHIE both sleep with their cell phones under their pillows - insisting their behaviour is "practical".

The 49-year-old Material Girl claims she sleeps with her BlackBerry in bed each night - because she likes to make notes on it if she remembers anything

she has to do mid-slumber.

But the megastar denies her habit is "unromantic" because her filmmaking husband plays with his phone until she comes to bed.

She says, "We lie right next to each other with our Blackberrys under our pillows. It's not unromantic, it's practical. I'm sure loads of couples have

their BlackBerrys in bed with them.

"I often wake up in the middle of the night and remember that I've forgotten

something, so I jump up and make notes.

"Guy's always waiting for me to come to bed, so he plays Brick on his BlackBerry until I'm ready." (CAM/WNTSU/JC)

Madonna also said she married Ritchie because he was a "challenge" - and she is easily bored when it comes to love.

The Material Girl's eight-year marriage to the filmmaker came under intense scrutiny last month when the Ritchie failed to show up at New York's Rock & Roll Hall Of Fame induction ceremony, where Madonna was honoured.

But the singer denies the relationship is under threat, instead insisting the pair keep each other mentally stimulated with their "tough" personalities.

She says, "I had to marry someone as tough as me. Guy's definitely tough, he doesn't give in.

"But he's obviously been put in front of me to teach me things and vice versa.

"I had to marry a challenge because otherwise I would just get bored. Whatever else Guy is, he's never boring."