Mumbai, Sept 25 (ANI): Bollywood beauty and brand ambassador of cosmetic brand Head andShoulders, Kareena Kapoor Khan was seen endorsing its new ad campaign'Pyaar Mein No Side Effects' at an event held in Mumbai recently. Speaking on the occasion the diva spoke about her association with the brand and said that Head andShoulder is the secret of her beautiful hair. Clad in a blue andblack dress Kareena looked as gorgeous as ever. The campaign also features Kapoor's Nawab husband Saif Ali Khan.