In 2007, Girls Aloud signed a £1.25m one-year deal to endorse hair care brand Sunsilk. The girls filmed a television advertisement and appeared in and magazine advertisements, with each of the five members being the face of a different shampoo. The same year, Girls Aloud also signed a deal with the UK division of Samsung. They endorsed mobile phones and MP3 players, made personal appearances and sang at Samsung events, and contributed to competition prizes, among other activities. The Samsung F210 Purple came with a 1GB memory card featuring Girls Aloud content. Girls Aloud appeared in television advertisements for Nintendo DS the following year. The group signed a deal to front a promotional campaign for a new low-calorie KitKat bar called "Senses" in March 2008. The chocolate bar manufacturer also sponsored Girls Aloud's Tangled Up Tour. The exact worth of the endorsement is unknown, but a figure of £500,000 each has been suggested. Sales increased 6.8% in the United Kingdom.