She partied hard, and celebrated her 29th birthday with style (as usual) at the TAO Asian Bistro and Nightclub in Las Vegas. I think it’s hilarious to have sponsors decorating your birthday cake, though!

Photo courtesy of US Magazine

What are your plans for your 50th birthday party? If you’re Simon Cowell, you’d rent out Wrotham Park in Hertfordshire, England. It’s this private mansion that the rich people rent to hold private parties. Look at that tent – maybe he’s planning to invite all American Idol contestants, past and present?

Pets – dogs in particular – seem to be a popular thing with Hollywood stars. While Jessica Simpson is frantically looking for her maltipoo Daisy, Heidi Pratt is proudly showing off her new maltipoo Dolly. She is a birthday gift from husband Spencer. I guess we’ll be seeing Dolly around a lot.

Filmmaker Spike Lee threw a birthday bash for the late Michael Jackson in Brooklyn. He would have turned 51. Countless fans were present; DJ Spinna played. At first, it looked like the weather would not cooperate but everything turned out fine for the thousands of fans who were present to celebrate the life of their idol.

The Hills actor was taken to the hospital for a case of appendicitis. Unfortunately for him, he had to spend his 26th birthday there. He tweets how much it sucks to be there on his birthday but that he’s happy because he’s got his lady with him. Get well soon, then.

The country singer is turning 44 on August 28 (she doesn’t look 44, does she?) and she promises fan a little something on that day. She says that she wants fans to visit her web site on that day, and that she will be giving everyone who visits a small gift. Just for the heck of it, I will be sure to visit Shania Twain’s web site on that day!

Demi Moore’s daughter celebrated her 21st birthday in Vegas. Rumer Willis was joined by her star studded family, including Demi Moore, and stepfather Ashton Kutcher; dad Bruce Willis and stepmother Emma Heming. Of course, her friends were there to help her out with the fun, too.

Amidst protests from residents who felt that Madonna’s concert date was ill-chosen (it coincided with a major Roman Catholic holiday), the star’s fans celebrated her birthday with her with a couple of songs. To the outpouring of emotions, Madonna replied “I feel your love!” She turned 51.

Not everyone loves this redheaded talk show host but he does have his appeal, don’t you think? Anyway, he celebrated his birthday – the 46th – on Sunday. Greetings to the redheaded one!

Suri just turned 3, and she had the time of her life at her party. It was princess-themed, complete with a Beauty and the Beast cake. The party was small, but the celebrations were big. Happy birthday little Princess!

How does it feel to be 16 and be known all over the world? Miley Cyrus aka Hannah Montana should know the answer. She also knows how it feels to have a hand-me-down Porsche for her first car. Not bad for a new old car, huh?

Ashlee Simpson celebrated her birthday in, uhm, style. The pregnant singer threw a white-trash themed birthday party. Sources say, “she wore Daisy Dukes and platform flip-flops with a bathing suit and a fake tattoo around her belly.” Cute idea. They should’ve invited the Spears family — who have got that theme down pat.

How sweet of Jennifer Lopez! The actress threw a surprise birthday bash for her husband, Marc Antony.

She told him the weekend was “too busy” to do anything special for his 40th birthday, then surprised him with a Cuban-themed bash. Marc Antony was “blown away” by the wonderful preparations.

It’s not quite your neighborhood birthday party. Britney Spears threw a truck-themed bash for her two boys, attended by Gwen Stefani, Jenny McCarthy, Heidi Klum and their kids.

Best part was the birthday presents: two custom-made cars. Hope her sons are better at driving than she is.

Happy Birthday, Blake Lively! The star celebrated her twenty first birthday.

Happy Birthday, Madonna! The singer celebrated the day at a party organized by her husband Guy Ritchie and well attended by friends.

Happy birthday, Jennifer Lopez! The actress enjoyed a quiet but meaningful day with hubby.

Happy Birthday Suri! Katie Holmes and Tom Cruise’s darling celebrates another birthday, with an adorable cake and loads of presents.

Happy Birthday, Posh!We’d wish that all your dreams come true, but what else could you ask for? Fame, fortune, a gorgeous husband.