She won a recording contract with Simon Cowell's record label in 2006 after triumphing in The X Factor.
And Leona Lewis showed her support for her long-time mentor as she attended his Hollywood Walk Of Fame celebration at AGO Restaurant in West Hollywood on Wednesday night.
The 33-year-old singer wowed in a flirty white strapless dress which flashed her toned legs with a tulle dip hem skirt.
The stunning dress featured a statement flared neckline and hugged her slender midriff and tiny waist.
She added height to her lithe frame with gold stiletto heels.
The Bleeding Love hitmaker wore her honey blonde locks in crimped waves while her pretty features were enhanced with smoky shadow, fluttery lashes and a fuschia lipstick.
Despite being recently engaged to boyfriend Dennis Jauch, the London native flew solo for the event.
Showstopper:The 33-year-old singer wowed in a flirty white strapless dress which flashed her toned legs with a tulle dip hem skirt
But the guest list for the late night soiree did include AGT's Heidi Klum, Mel B, and Howie Mandel.
Earlier in the day, Lewis attended Cowell's Hollywood Walk of Fame Ceremony.
The Bleeding Love hitmaker donned a stylish orange suit teamed with the same statement gold heels.
'You’ve been such a huge part of my journey & for that I’m forever grateful,' the pop star wrote on Instagram.
'So over the moon I could be there with you today to share in this incredible experience. Thanks for never being Mr. Mean to me.'
Leona hasn't released music since 2015 when she dropped her fifth studio album, I Am.
Supportive friends: Earlier in the day, Lewis attended Cowell's Hollywood Walk of Fame Ceremony. The Bleeding Love hitmaker donned a stylish orange suit for the event
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