She recently revealed they still have a ‘very close friendship’ even after his infamous assault on her following a pre-Grammy party back in 2009.  So perhaps it was unsurprising that Rihanna tweeted her support to Chris Brown ahead of his probation progress court hearing on Monday.  The 24-year-old star wrote to Brown in a direct tweet: ‘I’m praying for you and wishing u the best today!’ while he then responded: ‘Thank u so much.’ And in another more cryptic general tweet, Rihanna wrote: ‘Praying for you baby, my best wishes are with you today! Remember that whatever God does in our lives, it is WELL DONE!!! #1 Love.’ However, it is not clear whether she was referring to Brown in the tweet.  But the star’s prayers for her former beau were to no avail, with a Los Angeles judge revealing in court that Brown has tested positive for marijuana. At today’s hearing, Judge Patricia Schnegg revealed Brown, who wore a waistcoat and tie and looked sombre, failed a drug test on June 18 in Virginia, where he was fulfilling his court ordered community service, according to TMZ.  Brown then informed his probation officer that he has a medical marijuana prescription in California, the probation report said.