Complex sentence: Initially in the 1990s, she appeared in TV ads of which most famous was a Pepsi Ad with Aamir Khan and Aishwarya Rai, and was a VJ on music channels where she was noticed by Subhash Ghai.
Split into simpler sentences: Initially in the 1990s, she appeared in TV ads of which most famous was for Pepsi with Aamir Khan and Aishwarya Rai. She was a VJ on music channels where she was noticed by Subhash Ghai.