Despite being "single," Chris Brown was spotted spending time with his ex-girlfriend, Karrueche Tran.

The 24-year-old Grammy-award-winning singer who suffered a seizure last weekend was photographed riding the passenger's seat of a car with Tran. 

Tran was driving the red Porshe, while Brown was seen smoking a cigarette. 

Brown endured a nonepileptic (NES) seizure last Friday at a recording studio in Los Angeles and his representative said the doctors attributed the illness to "intense fatigue and extreme emotional stress, both due to the continued onslaught of unfounded legal matter and the nonstop negativity."

Tran was reportedly hysterical when she learned of Brown's medical emergency. 

"She couldn't believe it, she thought the worst and cried. She was relieved after that and told him to take care of himself and that she wished she could be there for him," a source told HollywoodLife.com

Tran "heard about Chris' unfortunate accident this morning and the first thing she did was grab her phone and call to him to make sure he was all right," the source added. 

Brown is said to be doing much better after the seizure, with the help of Tran who has been there for her friend. 

"That's her boy and she loves him so much and when he's hurt or sick, she's hurt and sick. Her whole day was off and awkward after she heard what he is going through back home," the insider explained.

Rihanna, who was reportedly heartbroken after her breakup from the "Love More" singer, was also concerned about Brown. 

"She's glad he's doing better and wants him to be all right and take care of himself," a source said.