Myleene Klass looks sensational in a colourful floral dress as she returns to work at Smooth FM

Myleene Klass looked sensational as she got up bright and early to go to work the morning after Keith Lemon’s 50th birthday party.

The former Hear’Say singer, 45, made a stunning impression in a colorful floral maxi dress from her Next range as she posed for a sizzling video.

The star, who can currently be seen in the pre-recorded I’m A Celebrity… South Africa, accessorised with a collection of gold necklaces.

In the clip, shared on Instagram on Sunday, Myleene boosted her height with gold heels and accentuated her natural beauty with a full face of makeup.

As she made her way through the Global studios for her Smooth Radio show, she wrote in her caption, “Mirror, mirror on the wall.

Radiant: Myleene Klass looked sensational as she got up fresh and early to go to work the morning after Keith Lemon’s 50th birthday party

Hot stuff: The former Hear'Say singer, 45, put on a stunning show in a colorful floral maxi dress from her Next range as she posed for a sizzling video

Hot stuff: The former Hear’Say singer, 45, put on a stunning show in a colorful floral maxi dress from her Next range as she posed for a sizzling video

Stunning: The star, currently seen in the pre-recorded I'm A Celebrity... South Africa, complemented by a collection of gold necklaces

Stunning: The star, currently seen in the pre-recorded I’m A Celebrity… South Africa, complemented by a collection of gold necklaces

Back to work: As she made her way through the Global studios for her Smooth Radio show, she wrote in her caption

Back to work: As she made her way through the Global studios for her Smooth Radio show, she wrote in her caption “Mirror, mirror on the wall”

“#ootd @smoothradio @global @nextofficial #MyleeneKlassXNext Ad Black Floral Maxi Slip Dress D23-838.”

But the night before, the presenter and her husband Simon Motson had dressed up as Mozart and Salieri, while Simon dressed up as a piano.

Myleene looked like she was making the most of the party as she busted out some moves and shared the clips on her Instagram story.

Keith enjoyed a star-studded dress-up in celebration of his 50th birthday on Saturday night with a host of his famous friends spending the night drinking and dancing.

The comedian invited Emily Atack, Holly Willoughby and Laura Whitmore, among others, to the London event, where everyone gave their best with their costumes.

Emily, 33, put on a glamorous display as she dressed the late Marilyn Monroe in a white off-the-shoulder dress with a thigh-high slit and a matching shawl draped over her shoulders.

She shared snaps from inside the party as she posed with the year-old and her former Celebrity Juice co-star Laura, 37, and husband Iain Stirling.

They looked like they were all having a great time as they hit the dance floor and sipped champagne.

Outfits: Myleene and her husband Simon Motson dressed as Mozart and Salieri, with Simon dressed as a piano

Outfits: Myleene and her husband Simon Motson dressed as Mozart and Salieri, with Simon dressed as a piano

Laughter: They looked like they were all having a great time as they hit the dance floor sipping champagne (Keith played Myleene's piano)

Laughter: They looked like they were all having a great time as they hit the dance floor sipping champagne (Keith played Myleene’s piano)

Laura also gave a glimpse of the lavish venue decorated with huge luminous 50 signs and the birthday cakes made for Keith.

Elsewhere, Holly, 42, was seen in a hot pink flared jumpsuit with stars on the lapel and Barbie-style legs from the upcoming movie starring Margot Robbie.

She was joined by her This Morning co-host Phillip Schofield, 61, who dressed as Ron Burgundy from the Anchorman films.

Also in attendance was Emma Bunton, 47, who stepped out with husband Jade Jones, 44.

Spice Girl Emma looked sensational as she put on a leggy display in a white shirt dress.

Baby Spice added a few inches to her stature by wearing a pair of beige platform shoes and carrying a handbag in the shape of a seashell.

She wore her long blonde hair in waves while dressing up as the character Madison from the 1984 movie Splash.

Played by actress Daryl Hannah, the film follows the story of a young man who falls in love with a mysterious woman who is secretly a mermaid.

LOL: People were shocked by Myleene's incredible costume as she posed with others in attendance

LOL: People were shocked by Myleene’s incredible costume as she posed with others in attendance

Having a great time: Myleene shared some videos dancing on the dance floor with the birthday boy

Having a great time: Myleene shared some videos dancing on the dance floor with the birthday boy

Pop star Emma seemed in high spirits as she arrived with former boy band star Jade as the pair walked arm in arm.

Elsewhere, Fearne Cotton, 41, who was also a Celebrity Juice regular, wore a bright yellow top and brown plaid skirt when she arrived.

She put on a beret and a scarf and increased her height by wearing a pair of black heels at night.

TV and radio star Fearne was seen alongside her husband Jesse Wood, 46, who looked smart in a gray suit and brown hat.

Many of the stars took to their Instagram pages to share photos of themselves in their costumes or from the inside at the party.

Emily posed with her arm around Leigh, also known as Keith Lemon, with the funny man dressed as Star Wars character R2-D2.

Keith took to Instagram for his birthday to joke about his age, joking that he was as old as some retro items.

He wrote: ‘Birthday tomorrow! I’m as old as #Atari, #theexcorcist #mcdonaldsmcmuffin #pharrellwilliams #tyrabanks #nevecampbell #davechappelle #swampthing.