Justin Bieber stirred controversy by getting arrested last week. Now, both fans and critics alike reacted on Twitter, whether to defend or mock the troubled pop star - a hilarious mash-up photo of JB's mug shot and Miley Cyrus' snapshot goes viral, causing many to wonder if they are actually twins.

Underage drinker Justin Bieber was arrested in Miami for driving under the influence, as well as drag-racing by going 60mph in a 30mph zone on Thursday morning. While Beliebers took to social media to stand up for the "Bad Day" singer, others were quick to attack him with the help of Photoshop.

Several Twitter accounts pointed out Bieber's strikingly uncanny resemblance to fellow pop star Miley Cyrus, who also gets enough negative criticism for her previous antics.

@ZacharyJaydon posted perfectly matched half-and-half images of both singers with the following caption, "Okay, I've heard the comparison ALL day, but it's UNCANNY, how much Bieber and Miley Cyrus look like TWINS. (PHOTO)."

Similarly, @hafizkenny shared side-by-side photos of the singers, suggesting that they are almost identical, the only difference being "Without makeup" for Justin Bieber's mug shot and "With makeup" on the "Adore You" singer's snapshot. "My brother just sent me a picture of Bieber hmm," he tweeted.

@Marissa_Pearson humorously summed up a common sentiment online by saying, "Miley Cyrus and Justin Bieber were actually separated at birth uno."

However, those Photoshop images of the singer clearly made Justin Bieber's fans quite upset, to the point that some of them were willing to unfollow their own friends on the social media. "If I see that half Justin Bieber, half Miley Cyrus picture or anything about Justin going to jail I'm going to go insane then unfollow," @RonnnBurg tweeted.