In pictures: the best celebrity selfies

US President Barack Obama and British Prime Minister David Cameron pose for a selfie picture with Denmark's Prime Minister Helle Thorning Schmidt next to US First Lady Michelle Obama during the memorial service of South African former president Nelson Mandela at the FNB Stadium (Soccer City) in Johannesburg on December 10, 2013. AFP

Tyrese Gibson as he left the UAE after filming for Fast & Furiuos 7.

Screenshot of a selfie by Justin Bieber with Selina Gomez.

A screenshot of a selfir by Miley Cyrus on Instagram.

Taylor Swift rings in New Year 2014.

A screenshot of Lady Gaga's selfie on Instagram.

A screenshot of Michelle Rodriguez's selfie on Instagram. The black dots, a technique used for creating special effects.

We look at some of the best celebrity selfies taken ahead of the release of Kim Kardashian’s selfie book.