Justin Bieber's Transformation: Has He Put His Bad Boy Past Behind Him?

Last year was a rocky one for Justin Bieber, but he could turn things around in 2015.

Last year was a rocky one for Justin Bieber. From paying $80,000 to an ex-neighbor in an egging incident to getting arrested for DUI and drag racing in Miami in 2014, the pop singer had more than his share of run-ins with the law, but can he turn over a new leaf in 2015?

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During a Thursday appearance on The Ellen DeGeneres Show, the 20 year old brought flowers to celebrate Ellen's 57th birthday on Jan. 26.

"I think it's just cool to be able to laugh at yourself. I've done some things that might not have been the greatest," Bieber told Ellen. "I just want to be able to kind of just own up to some of the things."

The singer got surprisingly candid in a late-night video posted to his Facebook on Wednesday.

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"It's been a minute since I've been in a public appearance and I didn't want to come off arrogant or conceited -- or basically how I've been acting the past year or a year and a half," Bieber said. "I'm not who I was pretending to be. And where I say pretending -- often we pretend to be something we're not as a cover-up of what we're truly feeling inside."

"Just being young and growing up in this business is hard," Bieber added, addressing his early fame. "Growing up in general is hard."

When Usher first signed Bieber he reportedly hired a "swagger coach" to help create Bieber's persona. While it seems as if Bieber is prepared to do away with his bad boy ways, PR expert Howard Bragman isn't buying it just yet.

"He certainly used the right words, but the reality is we're only going to know six months down the road and we see how he lived his life," Bragman told ET. "I don't think kids 19 or 20 know who they quote 'really are.' I think he has good values that he needs to revert to."

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Bieber's antics earned him the title of 2014's Most Annoying Celebrity by the Toronto Sun and it's been three years since the release of his last full-length album, Believe. Bragman thinks that Bieber's latest appearances could be a start in the right direction if he has any projects in the works.

"If he does have an album coming out later this year, now is the smart time to fix his reputation," Bragman said. "The most important thing is that he gets that there's an image problem. Like anyone with a problem, the first step is to acknowledge you have a problem."