Teen Vogue cover girl Demi Lovato has created a fashion-themed music video for her song “Me, Myself & Time.” The video launches tomorrow on Disney Living’s YouTube site, but we were lucky enough to receive an exclusive sneak peek. The music video follows a young girl on her first day back to school wearing outfits from the D-Signed clothing line, a collaboration between Target and Disney that is set to debut for back-to-school 2010. The line is geared towards tweens and is inspired by Disney Channel characters, including Demi’s character Sonny Munroe from Sonny with a Chance.

Check out the video to find out Demi’s top fashion tips and see a mixed and matched look from the D-Signed line! The full video will be released here tomorrow. Thank you to Sierra for the heads up!