MUMBAI: Canadian singer, Justin Bieber, was a kind ex-boyfriend to Selena Gomez during her struggle with lupus.

A source has revealed that the 23-year-old singer-actress was afraid before beginning treatment, particularly because she might lose her hair, but “she had Justin to support her through the whole ordeal,” reports aceshowbiz.com.

“He (Bieber) would always tell her (Gomez) she's the most beautiful girl in the world, and that it wouldn't matter if she gained weight, lost her hair, or anything,” the source was quoted as saying by hollywoodlife.com.

“He would make up little songs for her...and if they were both in L.A., he'd come over and order in her favorite foods from all the most expensive restaurants in Beverly Hills,” the source added.

The ‘Come & Get It’ singer had opened up to Billboard magazine earlier this month that she had undergone chemotherapy to treat the illness when she was rumoured to be having an addiction to drugs.