One of the requirements of being a celebrity is to have an abundance of unnecessary tattoos. Some of these tattoos are visible, but some have been cleverly concealed for years. I've done some *investigative journalism* on Instagram and will now share the results.

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  Justin Bieber Yesterday, young Justin shared a topless Instagram photo. Many would have carelessly swiped past it, appreciating his form and carrying on with their day. Not I. I immediately took a screengrab and investigated further. You can imagine my HORROR to discover Justin's latest inking. Scandalous.   Miley Cyrus Miley must've been reading our 2015 Commemorative Tattoo Ideas because she's robbed the best one! That's right, young Cyrus took to Instagram to debut her brand new festive inking - Teresa Mannion! Don't take risks on treacherous albums Miley and don't swim in the sea.   Liam Payne Often considered the most sensible member of One Direction, Liam has well and truly shaken that title today. He shared a photo on Instagram of his impressive physique, along with a plethora of ghastly tattoos. Adding further surprise, it has transpired that Liam has combined a very literal caption with his latest tattoo: a duster. Clean up your act, William.   Kim Kardashian Not as obvious as the above tattoos, Kim has commemorated reaching 55 million complaints about her social media presence by getting a few subtle inkings. If you look very closely you can see a few dotted around her face in a very subtle manner. Ever the genius, Kim sometimes covers up the tattoos with a heavy foundation, but we know they're there.   Mark Wahlberg E! Online brought this tattoo to my attention with their latest Instagram update on Mark Wahlberg earlier today. The renowned banana enthusiast has been a bit nudity-shy of late, and now we know why! He's taken his banana relationship one step further by getting an inspirational quote on his chest. If you look closely, you can see that Mark has a second banana tattoo below the quote. Insanity.   Lady Gaga A keen fan of Blue's Clues, Gaga took her passion to the next level and got a commemorative tattoo of the adorable gender fluid dog on her hand last year. Only the top investigative journalists would have noticed the latest addition to her flawless skin, as it's quite subtle and understated. Dozens of copycat fans have been getting similar tattoos as a tribute, meaning there is a genuine worldwide shortage of blue tattoo ink currently.   50 Cent Notorious chocolate fiend, Fiddy was caught rapid when he uploaded a cheeky topless snap two weeks ago. What appears to be a completely innocent photograph actually tells the tale of a devastated Irish pop group fan, longing for his heroes to regroup. We contacted 50 Cent for a comment in relation to the discovery of his tattoo, but are yet to hear back.   Beyoncé In another questionably Photoshopped photo, Beyoncé revealed to the world, her very first tattoo. Your eyes do not deceive you - that is a map of Cobh on one of the most famous thighs in the world. Beyoncé recently spoke to reporters about the tattoo, "I just really like saying Cobh", she said.