JLS are in Las Vegas to celebrate band member Marvin Humes' stag do.
To make sure Marvin does not forget his fiancée Rochelle Wiseman his friends have bought comedy masks of the singer for them all to wear.
A source told the Daily Star: "A bus pulled up to Las Vegas airport to take Marvin and nine of his closest mates up to their super-expensive hotel.
"When Oritsé got on the bus he pulled out masks of Rochelle's face and passed them around for everyone to wear.
"Oritsé then made a speech telling Marv to get used to Rochelle's beautiful face being around 24/7 once they're hitched."
The eight-day holiday has been organised by Oritisé and he has the lads on a strict timetable.
The insider added: "The lads have brought along a bag of goodies to keep them entertained and embarrass Marv.
"They were passing round a huge bottle of Grey Goose vodka on the bus.
"They have also spoken to the hotel manager about having a pool party."
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