Its Demi Lovato's birthday today and all her colleagues and fans have been sending her well wishes. The 22-year old singer has been through some pretty tough times, but she was able to survive all of the trials. The "Skyscraper" hitmaker shared to the whole world what she had to go through to fight drug addiction and depression in her new book "Stay Strong".

She wrote, "When you are no longer hiding anything, you don't worry about what is going to get out. I don't care who knows about my life, and now that I am an open book a huge weight has been lifted off my shoulders."

Perez Hilton quoted what Demi said about how she's doing now: "I am happy, but I've realized experiencing that bliss is something you earn when you put in the work." It seems that's what the pop star is doing right now because she has been very busy promoting her fourth single "Really Don't Care".

The Twitter world was flooded with many Demi Lovato birthday greetings because they're all proud of what she has achieved. Yahoo Lifestyle UK posted an article about the singer and wrote, "#HappyBirthdayDemiLovato! Here are 22 reasons we think you're AWESOME."

Demi's luck has changed the moment she decided to turn her life around and work hard to achieve her goals. Because of her busy career, some people thought that she had already taken her relationship with Wilmer Valderrama for granted and there were even reports that they have split up.

However, Hollywood Life confirmed that they are still together. The website reported, "While the two have never publicly admitted their relationship, Demi is still dating Wilmer Valderrama and the longtime couple are going strong."

Just recently, the birthday girl joined the ALS Ice Bucket Challenge and dared her boyfriend to do the challenge as well. Watch the video here:

Wilmer Valderrama took the ALS Ice Bucket Challenge together with Ashton Kutcher. Watch the video and see who else joined the actors:

Since its Demi Lovato's birthday today, what wish would you like to give the singer?