Emma Bunton celebrates 40th birthday on Heart

As part of the celebrations, Emma ticked off one of her bucket list dreams: presenting the radio show from the comfort of a bed. Much to Emma's delight, co-host Jamie Theakston surprised her by arranging for a bed to be set up in the Heart studio.

Throughout the show, birthday wishes came from famous friends including Geri Halliwell, Ant & Dec and Keith Lemon. See birthday messages below:

Ant & Dec - "Hello Em, Ant & Dec here but you know that, you can tell by our voices. Happy birthday – I hope you're having a great day. We just wanted to stop by and say we remember being at your 18th birthday party many, many, many, many, many moons ago. Have a great day today sending you lots of love and see you soon. Big kisses"

Amanda Holden - "Emma Bunton welcome to my world darling. The forties will be the best time of your whole life. Get married – hurry up and get married"

Geri Halliwell – "Happy birthday darling, it's Geri. I hope you have an amazing day, can't wait to see you later. Yeah you're 40 but you're still my little sister and I love you dearly. Big kiss"

Melanie C – "Have a wonderful day my darling. We love you very much"

Jess Glynne - "Hey Emma this is Jess Glynne. Have an amazing birthday"

Keith Lemon and Paddy McGuinness - "Hi this is Keith Lemon and Paddy McGuinness here hello. We can't be there today because we are busy filming, we just wanted to wish you happy birthday Emma. Have a great 40th, sorry we can't be there"

Alesha Dixon - "Happy birthday Em. I absolutely love you and I can't wait to see you soon gorgeous lady"

Fleur East – "Happy Birthday Emma Bunton and obviously it's a really, really wanna zigazig ah"

Rochelle Humes – "Happy birthday my lovely Emma. I can't wait to throw some shapes with you and wishing you the best birthday ever. This is your girl on the dance floor Rochelle Humes"

Jade Jones – "Happy birthday my darling. I hope you are having a wonderful day my love. Enjoy yourself and make you sure get Jamie to make you a cup of tea - it is your birthday after all. My darling I love you so much. Happy birthday and enjoy. I love you"

Emma's sons Tate and Beau – "We love you Mummy. I love you so so much"

Emma's Mum: "Hi my darling girl it's Mummy here. Just want to wish you a very happy 40th birthday. Wahoo. Lots of love"

Holly Willoughby – "Emma you naughty little Bunton. I love you very very much, I can't believe the baby is now old spice. Happy birthday to you my darling"

Phillip Schofield – "You look absolutely beautiful for someone who carries 60 years so well. you're looking amazing"

Piers Morgan – "I would love to wish Emma Bunton a very happy fortieth. She doesn't look, she looks at least 42. No she looks about 32. She has always been the little baby of Spice Girls and a delightful lovely lady and I wish her all the very best on her birthday"

Tess Daley – "Hi Emma this is Tess Daley. Love you to bits you are a beautiful lady, baby spice is all grown up. I cannot believe you can be anywhere near 40. You glorious and gorgeous and fabulous. One heart Mama you celebrate babe and have a brilliant day"

Jay McGuiness - "Hi Emma, this is Jay from The Wanted. Have an amazing birthday. You don't look a day over baby days old"

Ricky Wilson - "Hey Emma. Happy Birthday. I'm not going to say your age because everyone else has"

Rudimental - "Yo, happy birthday Emma Bunton. We absolutely love you have a great day and an amazing time from Rudimental. Peace"

Tune in to Jamie Theakston and Emma Bunton on Heart London Breakfast, weekdays from 6am – 9am.