Justin Bieber "in a Good Mood" After "Worst Birthday" Ever, Gets "Bat Bike" Present From Dad

Singer is upbeat as he prepares to take the stage in London

Justin Bieber seems to have finally put his "worst birthday" ever behind him.

"In a good mood," the pop sensation tweeted on Monday. "Got my friends and team with me here and ready for Day 1 at the O2. London get ready!"

Of course, getting a pretty cool present from dad had to have contributed to his upbeat attitude as well, right?

Seriously. It's not everyday one gets a customized motorcycle. Or, more specifically, a bat bike.

And in this video, the singer's father Jeremy gives us glimpse of the sweet ride, which features a nod to the singer's 35 million Twitter followers, some artwork representing his many tattoos as well as Batman and "JB" logos.

"That's what you get when you're 19 and you're Justin Bieber," Jeremy says.

Yep. It's good to be the king the Biebs.