Bobbi Kristina honours Whitney at Sparkle premiere

Whitney Houston's daughter Bobbi Kristina Brown put on a brave face to join the cast of Sparkle and celebrate the release of her late mother's final movie on Thursday (16Aug12) at the film's Los Angeles premiere.

The 19 year old and her boyfriend Nick Gordon, who was informally adopted by Houston when he was 12, smiled for the cameras as they posed on the red carpet at the event, which was also attended by Sparkle stars Jordin Sparks, Derek Luke, Mike Epps and Cee Lo Green.

Taking to Twitter.com before the premiere, Brown messaged Sparks and wrote, "See you tonight mamacita ! I can't wait . It's gonna be tough, let's try to CELEBRATE. love you Jordan".

She then added, "Time to walk this carpet&rep (represent) mommy like she would want me too (sic)".

After the screening, an impressed Brown tweeted, "2nite was incredible..! SPARKLE! JordinSparks &all the cast, I Thanku4makinitUNFORGETTABLE (sic)!"

Other guests at the premiere included singer Christina Milian, actresses Amber Riley and Tika Sumpter, and R&B star Ray J, who dated Houston on and off until her death in February (12).