The proposal took place Friday at the Midwest Bank Amphitheatre.
Santana popped the question four songs into the show on the Chicago-area stop on his Universal Tone Tour 2010. The romantic gesture followed Blackman's virtuoso drum solo on the Santana hit "Corazon Espinado." After she accepted, the just-engaged couple kissed and the audience broke into cheers, Santana's representatives said in a news release Monday.
"Cindy and I are blessed to have found each other," Santana said in a statement. "Being in love is a gift from the universe, and the spirit and vibrations that come with it are infinitely powerful. I look forward to expressing that incredible energy through my music, and in helping to tip the balance toward more love in the world with what Cindy and I share."
Santana's engagement to Blackman comes almost two months into the first leg of the Universal Tone Tour 2010, with North American dates featuring Steve Winwood as opener.