Pop artist Rihanna and ­rapper Professor Green are the stars of an on-pack ­promotion to launch two new Doritos variants.

The Tantalising Tikka and BBQ Rib flavours, available now (rsp: £1.49) feature a 'barcode-like' ­design that consumers scan in front of a webcam to gain access to exclusive Rihanna and Professor Green tracks and videos online.

The eight-week Late Night campaign would "enhance the Walkers brand's position as the perfect snack for a big night in", said a spokesman.