However, Kate was so worried ''all eyes would be on her'' so she went to Genoa, Italy with her daughter Lila and her father Jefferson Hack.
A source revealed: ''Kate is not in a great place at the moment and she couldn't face a weekend of partying. She felt that all eyes would be on her and if she looked miserable it would get back to Jamie. To say she's going through a difficult time would be an understatement.''
Kate's pal Rita Ora tried to persuade her to go to Ibiza as it would ''cheer her up'' but it didn't change her mind.
The source told The Sun newspaper: ''Rita was desperate for Kate to still come to Ibiza, as she thought it would really cheer her up. Even yesterday she was trying to convince her to change her mind.''
The 41-year-old beauty ''hated it when other women flirted with Jamie'' and so when photographs surfaced of him with Jessica, it ''really hurt her''.
The source added: ''She's always hated it when other women flirted with Jamie so the pictures of him and Jessica really hurt her.''
'No Turning Back' was released on this day (January 3rd) in 2003.
Bastille rocked up at The Winter Gardens in Margate for their 'Doom Days Club Nights' tour, making sure they were playing in more unfamiliar towns...
Stealing Sheep made their way down to Elsewhere in Margate to put on their wholly unique and utterly captivating live show.
Listen to her new single 'Down'.