Pop star Justin Bieber, 26, the youngest sister of Bay Bieber, has recently joined Instagram. He’s probably one of the youngest somethings in the world, as only 1-year-old Bay already has nearly half a million followers on social media.

The account is maintained on behalf of Bay by his parents Jeremy and Chelsey Bieber. Jeremy is also Justin's father.

On the account, the parents have shared sweet moments from little Bieber’s everyday life.

- If you love cute babies, you are on the right side! profile presentation.

Justin Bieber’s father, Jeremy, married his girlfriend Chelsey while the couple was expecting their first child together.

In addition to Bay, Bieber also has two younger siblings: Jaxon, 8, and Jazmyn, 10. Jeremy’s father has had children with three different partners, and Bieber is the eldest of the children.

A joint photo with the world-famous big brother has also been published on Bay’s account. In the picture, the duo is enjoying a sweet nap on the couch.

If you look closely, you can see similarities in Justin and Bay.

- Dear sister, you will grow into a confident, strong, kind, compassionate strong woman! I follow with interest your growth into an amazing woman, which is determined by your destiny, Justin wrote about her little sister in one of her updates.

Justin Bieber rose to fame in 2008 with his hit One Less Lonely Girl when he was only 14 years old. She has released numerous chart hits, the best known of which include Baby, Boyfriend and What Do You Mean. She is married to model Hailey Bieber (nee Baldwin).

Over the years, Bieber has spoken openly about his substance abuse problems and the pressures that come with publicity and childhood.

  • Read more: Pop star Justin Bieber makes a fierce account of how childhood destroyed his life - he was caught on a drug hook at the age of 13