Robbie Williams joined Barlow in Los Angeles , Jennifer Hudson assisted Rowland in Miami , Walsh was accompanied by Sinitta in Barcelona .
Tulisa received help from Jessie J in Mykonos .
Robbie Williams joined Barlow in Los Angeles , Jennifer Hudson assisted Rowland in Miami , Walsh was accompanied by Sinitta in Barcelona , and Tulisa received help from Jessie J in Mykonos .