 Sales were boosted by the grunge band Nirvana's "Smells Like Teen Spirit".When Mennen was acquired by Colgate-Palmolive in 1992, the Teen Spirit brand was said to be the most popular product of its kind in the US, and was the favorite of nearly 1/4 of all teenage girls.Because of its immense popularity, Colgate-Palmolive planned to begin a new hair care line with the Teen Spirit name.