Justin Bieber calls love with Selena 'unconditional'

Pop star Justin Bieber mysteriously posted and then deleted an intimate picture with on-and-off girlfriend Selena Gomez on his Instagram account.

In the black and white photo, Gomez, 21, is cradling the 20-year-old singer's head in her arms and gazing into the camera, reported Us magazine.

Bieber momentarily captioned the pic, "Our love is unconditional." 

This is not the first time the Bieber, 20, has randomly shown love for Gomez on Instagram.