He's also performed exclusive concert for the Ex-Prime Minister at Kumaragam in 2001 and at Goa in 2002. He rendered the invocation song at Parliament at the 26th Jan 2000 function being the centenary of the Independence.
He has toured U.S.A. in 2002, 2004 & 2007 performing Ghazal Concerts at more than 15 Cities each time
Hariharan also collaborated with Pakistan based band Strings for a track called "bolo bolo". Hariharan released an album called destiny with Punjabi / bhangra artiste Daler Mehndi. His newest Ghazal album "Lahore ke rang, Hari ke sang" with renowned ghazal composers from Pakistan won him rave reviews and critical acclaim inside and outside india.
Hariharan also coined the terminology "Urdu Blues" with his immensely successful album "Kaash" which featured musicians like Anandan Sivamani the percussion maestro, Ustaad Rashid Mustafa on tabla, Ustad Liyaqat Ali Khan on Sarangi. Hariharan also worked with tabla maestro Zakir Hussain on his ghazal album Haazir.
He has acted in a film “POWER OF WOMEN”
Hariharan holds privilege of inaugurating Common Wealth Games with his composition and rendition of "Swaghatham Song" and also performed at the Qutub festival and the sports village. Also he performed at the Rashtriya Bhawan for the H'ble Indian President Smt. Prathibhathai Patil in the year 2010.