Justin Bieber’s relaxing b’day party with grandparents

“Hopefully my grandparents will be out here and I’ll be able to spend time, a little bit, with them,” Justin tells Entertainment Tonight. “My grandma makes the best cheesecake – cherry cheesecake. She made that for my 13th birthday.”

The singer, who turns 17 on March 1, also said there will be “no birthday bash,” as he has to get ready for his upcoming tour: “I only have, like, four days, so I’m just going to relax, because I start my world tour starting on [March 4] – so just going to mentally prepare and just relax.”

Bieber also talked about his new haircut which had fans shocked around the world.

“I just wanted to [cut my hair], that’s all. Not really a big reason; I just woke up and said, ‘I don’t want this anymore,’ so I just cut it,” he said. “It’s not really about that. You know, the fans really liked it, but they’ll like me no matter what, because I think it’s about the music. I’m really excited to see what the fans overseas think and take it day by day.”

This weekend Bieber will re-release his 3-D movie “Never Say Never”.

“It’s 40 minutes of extra footage, so it’s basically like a new movie,” he says. “It’s real exciting, because it shows me and my friends more and it shows a different part of the concert, so it’s going to be great. Hopefully all the fans will go back and watch it.”