And her distinctively happy mood since her split with husband Kris Humphries, may well be due to her ex-boyfriend Reggie Bush.
The 31-year-old reality star reportedly had a lunch date with her former flame over the Grammys weekend, according to TMZ.
Happy as a clam: Kim Kardashian couldn't keep a smile off her face when she arrived at the gym this morning after reports she enjoyed a date with Reggie Bush
Sources tell the celebrity website that the two 'appeared close and were laughing and smiling together.'
While it is unclear whether the two are heading for a reconciliation, the date is said to be not the only one the pair have enjoyed in the past few days.
Dangerous curves: Kim showed off her curves in some grey leggings and a tight-fitting black hoodie
Kim and Reggie enjoyed a two year relationship before initially splitting in July 2009. Two months later they got back together before ending their relationship again in March 2010.
Kim later went on to tying the knot with NBA basketballer Humphries last year, but the couple ended their marriage after just 72 days.
Spring in her step: The 31-year-old reality star reportedly had a lunch date with her former flame over the Grammys weekend, according to TMZ
Quick change: Kim later changed into jeans and high heels after her workout today
During an interview with New York's Elvis Duran and the Morning Show, Jaxson said: 'She's never gotten over [her ex Reggie Bush].'
Former flame: Reggie, seen here last month, apparently met Kim at the Beverly Hills Hotel on Saturday
Many thought that the Keeping Up With The Kardashians star and the sports star would end up getting married due to the closeness of their relationship.
Meanwhile Kim recently was forced to deny rumours that she was secretly dating another American Footballer, Mark Sanchez.
Drama: Kim and Reggie enjoyed a two year relationship before finally splitting in 2010, and Kim went on to marry NBA basketballer Humphries last year
In fact she said that she didn't even know the sportsman.
She wrote: 'Dating rumors are always fun when u don't even know the people your supposedly linked to! Who makes this stuff up!'
Rumours that Kim was moving on following the breakdown of her 72-day marriage to basketball player husband Humphries by dating the New York Jets player emerged earlier this month.
They came after the NFL star was said to dating Victoria’s Secret Model Kate Upton.
Sunday best: Kim wore a demure minidress to attend church with her family yesterday in Los Angeles
The website claimed a source said: ‘They are very careful with not being seen together, Mark is seeing someone!’
The informant added: ‘Kim and Mark like to meet in hotels for dinner dates and ‘flings’. Whenever Kim is in New York, they hang out.’
Revealing: The look was far more covered-up than her attire at Clive Davis's pre-Grammy party on Saturday night
Hollywood starlets: Kim and Britney Spears posed together at the gala
A representative for Kim also denied allegations that Kim is dating the quarterback.
Kim didn't attend the Grammys last night, but she did appear at Clive Davis' Pre-Grammy's party on Saturday night, which was held just hours after the death of music superstar Whitney Houston.