Christina Aguilera models a plunging ruby top as she performs in Vietnam

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Christina Aguilera was seen on stage in Vietnam on Tuesday evening as she dazzled the crowd by belting out her hit songs like Beautiful.The star was in a plunging beaded top with matching slacks that made the most of her curves with her blonde hair worn down at the VinFuture Prize Award Ceremony in Hanoi.The siren has been celebrating her 42nd birthday in the country alongside her fiancé Matthew Rutler.

Doing what she does best: Christina Aguilera was seen on stage in Vietnam on Tuesday evening as she dazzled the crowd by belting out her hit songs like Beautiful Showstopper: The star was in a plunging beaded top with matching slacks that made the most of her curvesChristina added hoop earrings and flashed her engagement ring from Rutler while on stage alone.And she added ruby red lipstick that matched her outfit, adding long black nails.

Over the weekend she had some adventure in Vietnam. The celebrity was treated to a private helicopter ride and an extravagant dinner at an oceanfront restaurant.The pop star looked blissful as she received numerous gifts, including a blinged-out birthday cake, a sparkly crown and bouquet of baby's breath and eucalyptus tied together with a pink ribbon.

Here hair: Her blonde hair was worn down down in soft waves at the VinFuture Prize Award Ceremony in Hanoi So glam: Christina added hoop earrings and flashed her engagement ring from Rutler while on stage aloneAs she dined at an oceanfront restaurant with her  and glam team, the mom-of-two beamed with bride as she stared at her dessert.Her fun-filled getaway also included kayaking and boat ride.While lounging in a hammock, the hitmaker cuddled up to her man as they took in the beautiful views of the water while cruising down the Eastern.