Sandra Bullock says her adopted son Louis makes her "so happy" that he has become a priority over her Hollywood career.

The 47-year-old seemed to be elated when she collected an Oscar for her role in 'The Blind Side' in February 2010 with husband of five years Jesse James by her side.

But weeks later she was shattered when it was revealed that Jesse had been having an affair with tattooed glamour model Michelle "Bombshell" McGee.

The story then took an unexpected turn when it emerged that Sandra had become a single mother to a baby son Louis, whom the pair had planned to raise together.

Bullock, however, maintained that the joy of becoming a mother overshadowed her heartbreak and acting is no longer her primary concern. "I wasn't thinking about any of that," the Daily Express quoted her as saying.

"I was just so happy being a mum - I'm still very happy being a mum. That just shifted and became my full priority. I love Louis and I love how he has changed my life for the better," she added.