UNITED NATIONS (IPS) - Having successfully lobbied the UN Children's Agency UNICEF to stop accepting donations from Israeli billionaire Lev Avnerovich Leviev, activists are urging celebrities who have made public appearances with Leviev to cut all ties with him. Leviev is the chairman of Africa Israel Investments, a global conglomerate that has been criticized by a variety of non-governmental organizations for its involvement in building settlements in the occupied West Bank.