Posh’s BFF is thought to have hired suites at LA’s ultra-exclusive Chateau Marmont hotel for the event, which will be held before the Beckham baby is due, in July.
And although David and Victoria insist they have no idea if their new arrival will be a boy or a girl, the pair are rumoured to have told friends there are expecting a girl.
It’s thought excited Mrs B told her famous friend she would like a pink-themed bash, complete with pretty pink balloons.
‘They know the sex of their baby, which is helpful for Eva,’ one insider told the Daily Mail.
‘She plans to fill the suite with balloons, and rumour has it that they will be pink, not blue.’
‘Thank u so much for your kind and beautiful messages!! we are all so happy and very excited!!!!!!!x vb x’ she wrote.