The 45-year-old singer's good fortune comes as his ex-wife Katie Price, 40, faces bankruptcy.
In a new Instagram post, Peter revealed he will be headlining the iconic stadium for the first time in 21 years.
Captioning a poster advertising the Stepback 90s event taking place at the SSE Arena, Wembley on October 11, the father-of-four wrote: "I am BUZZING.
"Headlining Wembley Arena for the first time in 21 years. Get your tickets :)) only a few left."
Earlier in the day the Aussie also announced he had signed a modelling contract with Italian designer Gianni Salvatore.
Beside an image of him posing in their clothing, he added: "I’m collaborating with the brand @gsalvatore_uk . They do amazing luxury wear.
"I’ve been working on some of the new designs with the founder for both men and women.
"They’ll be coming out soon and I can’t wait to hear what you think of them."
Both projects are likely to see the star – who shares one-year-old son Theodore and four-year-old daughter Amelia with his 29-year-old wife Emily – add to his £12.25 million fortune.
It comes as his ex-wife Katie – with whom he shares eleven-year-old daughter Princess and 13-year-old son Junior – faces bankruptcy.
The Sun Online exclusively revealed earlier today that she had spent £600 on perfume despite her financial woes.
She was shopping in The Perfume Shop in Horsham when she dropped the huge sum.
An onlooker exclusively told us: "Everyone was staring as she walked in.
"Me and my friends were shocked as we read about her money problems and how she's skint.
"Yet she didn't care and spent all that money on perfume!"
They added: "It was loads of high-end stuff, and she just handed her card over. She didn't care."
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