Selena Gomez was forced to seek treatment in hospital today.

The "Who Says" singer was spotted visiting the emergency room of a medical center in Los Angeles this morning after struggling to shift her sore throat. A source told gossip website TMZ.com that the 20-year-old brunette star developed a severe throat infection yesterday and was forced to cut short a recording session because of the pain. She went to hospital to rule out bronchitis - which her step-father currently has - and underwent further tests to see if she caught a contagious illness. The insiders said doctors don't believe Selena has strep throat but will have to wait a few days for her test results.

The hospital visit comes just hours after the "Love You Like A Love Song" singer helped her on-again/off-again boyfriend Justin Bieber, 18, celebrate winning three awards at the American Music Awards. The couple were spotted hand in hand at the official after party bash and left together last night.

Their reunion follows a brief split which saw Selena dump the Canadian popstar two weeks ago because of trust issues.