Demi Lovato sang Don’t Forget on the Ellen DeGeneres show on Wednesday. She’s really working hard.

Demi announced her tour in this appearance.

We think Demi is great, but hope she remembers to wear a helmet when she rides a bike.

On April 2 Miley Cyrus went to dinner with P.F. Changs Taylor Swift, Demi Lovato, Justin Gaston, Emily Osment, Tish Cyrus, Trace Cyrus, and Billy Ray Cyrus after attending the Hannah Montana movie premiere.

The Hannah Montana movie hits theaters on Friday April 10.

Demi Lovato and her younger half sister, Madison De La Garza, they have the same mom, were bicycle riding in Toluca Lake together today.

The pair look like they are having a fun time. Demi should know better than to be riding a bike without a helmet. She is setting a bad example. That’s something that Miley Cyrus might do, but not Demi.

Update: In California it is the law for anyone under 18 years-old to wear a helmet while riding a bicycle. Demi is 16 years-old. Click here to read it for yourself.

Demi Lovato announced on Twitter she got a new dog. She wrote:

"Madison got a new puppy. It’s a basically 2lbs. of adoreable and doesn’t even look real. We named it Bella and NO it’s not named after the vampire. She’s my Bella, I cannot get enough of this dog."

So cute.

Below are Demi’s tour dates:

• May 3 2009 8:00P The Bamboozle Festival – Meadowlands Sports Complex East Rutherford, New Jersey
• June 13 2009 8 PM Palacio de Deportes Madrid
• June 14 2009 8 PM The Zenith Paris
• June 15 2009 8 PM Wembley Arena London
• July 28 2009 7 PM Delaware State Fair Harrington, Delaware
• August 6 2009 7 PM Ohio State Fair Columbus, Ohio
• August 10 2009 7 PM Indiana State Fairgrounds Indianapolis

Below is an anti-smoking ad Demi did in 2007. We love the positive message Demi is also sending.

Here’s a sneak peak at the new Disney channel movie Princess Protection Program with Demi Lovato and Selena Gomez.