The 20-year-old star arrived at the premiere of film 'Bobby' arm-in-arm with her boyfriend Harry Morton.

Lohan’s boyfriend of two months, Harry Morton, 25, suspicions of an impending engagement with a visit to Cartier’s jewelry boutique in Beverly Hills’ shortly before leaving for a tropical vacation in Hawaii with Lohan. However, in an exclusive interview with Star, Lindsay’s mom, Dina Lohan, denied those rumors saying, “It’s absolutely not true.�? Dina admits that her daughter is “happy and has someone she can trust�? in wealthy son of former hotelier Peter Morton, but says that they are definitely not betrothed, but simply “dating and moving along.�?

In other news, on August 30th, around 1am, Lindsay Lohan was spotted taking the stage at L.A. club, Guy’s. She sang an animated duet of Stevie Nicks’ “Edge of Seventeen�? with friend Samantha Ronson, but when the song ended, Lohan wanted more. Lindsay-who’s second album was released last year- refused the announcer’s request to allow the next person on stage, and demanded to sing another song. They finally reached a compromise by allowing Lindsay to sing of “Sweet Child of Mine�? by Guns N’ Roses with the next waiting performer.