Roberto Cavalli celebrated 40 years in the business yesterday in Milan with his Spring '11 show. The Italian designer even recruited Natalia Vodianova for a rare catwalk appearance to show off his neutral, crocheted collection. There was an American rock'n'roll feel with skin tight leather fringed jeans, cropped lace up tops and tassled accessories. There were 40 models in the show to represent every year of his career and they wore pieces that were literally strung together. Cavalli is always extravagant and this season was no exception. He used animal prints, ostrich feathers, tie dye and crystal embroidery. Bizarrely, considering the amount of animal fabrics in the collection, Leona Lewis was sitting in the front row along with Taylor Swift, Heidi Klum and Rachel Bilson. Do you like this collection?