Rihanna has unveiled her second collection for high street chain River Island.

The 'Diamonds' hitmaker has designed a new range of clothing and accessories for the British brand, which will appear in stores from September.

The Rihanna for River Island autumn/winter 2013 collection will release an exclusive range for autumn next month, followed by a winter range just in time for the festive season in November.

Rihanna's second offering for the high street brand is chock full of the same urban-inspired items as her first collection - which was unveiled at London Fashion Week in February - with floor-length mesh dresses, army camouflage-patterned crop tops and daring body con dresses.

The 25-year-old singer said: ''I literally designed everything I wanted to wear, exactly how I wanted to wear it.''

The new range also features several underwear garments which are emblazoned with Rihanna's nickname, 'Riri', on the rim, as well as 'G4LIFE'. The phrase - taken from her 2009 song 'G4L' - stands for 'gangster for life'.

Rihanna's co-designer Adam Selman commented: ''The way I approach winter style is to layer up summer clothes and Rihanna does the same. But there are coats and sweatshirts - those pieces were key. It's a little more refined.''

The 'Pour It Up' singer personally oversaw the creative direction of the collection's accompanying campaign, which has a ''New York street vibe'' and was shot by photographer Lachlan Bailey.