Troubled star Lindsay Lohan is “amazing”, “great” and “happy” four weeks into her stint in a Los Angeles rehab, according to her mother Dina.

Lohan checked into the Wonderland Center on January 18 in a bid to “take care of my personal health”.

Dina says it’s having a positive affect on the actress. She tells People magazine, “She’s amazing. She’s great and she’s happy. She’s in a really good space right now.”