Justin Bieber working out to "get sexy for the ladies"

Justin Bieber has been working out to 'get sexy for the ladies'.

The 18-year-old - who recently admitted he doesn’t know what is going on in his on/off relationship with Selena Gomez - posted a picture of his progress from the gym on Friday.

He took a self-portrait in a mirror after stripping off his shirt to reveal his six pack and biceps.

While his head was cut out of the frame, his trademark tattoos - including a crown and an owl - were on display.

His low-slung trousers also revealed the top of his underwear.

He captioned the Twitter picture: 'Back in the gym'.

Later, he added: 'Good workout. #focused'

He recently told Canada's Macleans: 'I’ve been working out in the gym, getting bigger, trying to get sexy for the ladies.'

Source 1, 2