Singer Selena Gomez's parents are concerned about her reunion with notorious pop star Justin Bieber.

The couple was recently spotted kissing and hugging each other during breakfast at a restaurant in Texas, and on another day, Bieber dedicated a song to Gomez in a surprise SXSW party at a bar in Austin.

Soon after the 21-year-old singer was released from rehab for an unknown treatment, a racy video featuring Bieber and Gomez surfaced.

"Selena has chosen Justin over her family in the past," people.com quoted a source as saying.

"They are disappointed about that, her father has told her he doesn't like her spending time with him," the source added.

This is not the first time that the couple has got back together after their initial breakup in November 2012.

Early in January, they were seen together, riding Segways in Bieber's Southern California neighbourhood.