Bieber lashes out a paparazzi

(EDITORS PLEASE NOTE: THE PROFANITY IN THE BIEBER EXCHANGE WITH THE PHOTOGRAPHER HAS BEEN REMOVED)

A bad week for the "BEEB" just got worse.

19 year-old Canadian pop star Justin Bieber -- had this run-in with the paparazzi when he left his temporary London residence on Friday.

(NATSOT BIEBER ALTERCATION WITH PHOTOGRAPHER -- WITH BLEEPS)

The incident comes the day after the teen icon collapsed on stage after suffering from shortness of breath. Doctors gave him oxygen and he was able to finish the set.

Earlier in the week Bieber showed up 2 hours late in the first of four nights at London's O2 arena ... and was boo'd by his normally loyal fans.