The Black Eyed Peas star, who is part of Cole's management team, invited key industry figures to the bash as part of his bid to help her crack the US.
"Will was keen to settle Cheryl in LA and put her in touch with some important people," a source told The Sun.
"He's filled her diary over the next few weeks so she has plenty to do. He hopes to improve her profile and ensure she doesn't get homesick."
Cole reportedly angered X Factor USA fans when she was seated beside Simon Cowell on the second day of auditions.
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