The one present money couldn't buy! No sign of Rob Kardashian as mom Kris Jenner celebrates her 60th in extravagant style Read more: http://www.dailymail.co.uk/tvshowbiz/article-3308477/The-one-present-money-couldn-t-buy-No-sign-Rob-Kardashian-mom-Kris-J
Kris Jenner's champagne-fueled birthday blowout is whispered to have cost an eye-watering $2 million.
But as the Kardashian-Jenner momager celebrated her 60th in impossibly extravagant style, there was one thing no amount of money could buy - the presence of her only son.
Reclusive Rob Kardashian appeared to have sat out the Gatsby-eque 'Roaring 20s' party, despite being named as host alongside his sisters.
The one present money couldn't buy! No sign of Rob Kardashian as mom Kris Jenner celebrated her 60th birthday in extravagant style in Los Angeles on Friday
Not forgotten: While he didn't make the party, a vintage snap of Rob and his mother was shown as part of a video montage of her nearest and dearest
However, Rob wasn't forgotten at the party - with a vintage snap of him and his mother featuring in a video montage at the event.
Of course, a star-studded celebration with 250 of his mother's closest chums was hardly the kind of event to tempt the troubled 28-year-old, who has put his reality star days behind him.
As close as he is to his mom - Rob even has Kris' portrait tattooed on his arm - it would have been a huge surprise to see him attend.
Since dropping out of the limelight, Rob has missed many a family occasion due to the attention associated with any gathering of his sisters.
After flying in from Los Angeles to attend, he decided not to go at the last minute and caught a flight home.
It was rumoured at the time he left because he didn't want to be pictured in family wedding photos due to his weight gain.
The USC graduate was just 16 when he lost his lawyer father Robert Kardashian to esophageal cancer, and he later struggled with his family's choice to live life in the public eye.
Back in 2003 Rob gained around 100 lbs in one year, bingeing on fast food as he retreated from his image obsessed family.
Despite many reports of his struggles, Rob has since only very occasionally been sighted, and no longer appears in Keeping Up With The Kardashians.
Admirably, he does seem to be making an attempt to get his life back on track and was recently reported to have shed 15 lbs after embarking on a weight loss mission.
He is under the tutelage of celebrity trainer Gunnar Peterson and back in September US Weekly reported he was beginning to see good results.
Rob even shared a couple of Instagrams, which revealed a slimmer face while in another her showed off his arms.
Back in August his sister Kim Kardashian, 34, even revealed that she had been on a hike with her brother.
Despite his new regime, though, Rob obviously wasn't ready to meet and greet his mother's chums at her celebration.