Britney Spears frantically sent her boyfriend 100 text messages a day, his secret lover has claimed.

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The singer – who has an on/off relationship with paparazzo Adnan Ghalib – was terrified he was cheating on her so constantly bombarded him with calls and messages.

Amanda Pagel – who claims she slept with Adnan for three months behind Britney’s back – said: “Britney used to call all the time when he was at mine. She sent him hundreds of texts a day, sometimes just seconds apart.”

Amanda alleged Adnan – who recently claimed Britney was pregnant with his child – couldn’t cope with the Toxic star’s crazy lifestyle and wanted to move away with Amanda.

She told Look magazine: “He was sick of being ‘Mr. Spears’. He said the stress was taking its toll and he hated being pursued by the paparazzi. He asked me to start a new life with him. He said, ‘Let’s leave Hollywood, live in Italy and start a family.’ ”

Amanda also says Adnan always insisted he and Britney were just friends and she would never have slept with him if she knew they were a couple. Earlier this month, it was alleged Britney had dumped Adnan after finding racy text messages from other women on his phone.

A source said at the time: “There were about a dozen text messages from one girl, all sent on one day. They were pretty saucy stuff with sexual references – certainly not the sort you’d send to just a friend.

“Britney lost it and started yelling. She was demanding to know who sent the texts and shouting, ‘What’s this about? You’re cheating on me.'”