There are many dance and song sequences on RiAnsh and I liked all of them. But I want to mention some of them which I liked more.
1. Their first cruise dance on female version of IMMJ2. (not ghongroo one, because in premium episode, I watched the dance sequence with title song female version which I liked more than ghongroo one and I still have that dance video with female version of title song only). Helly Shah and Rrahul Sudhir's chemistry was visible then which was on fire and which still is.
2. Ek din tera ho jaunga. I really like the song sequence very much. Their dance and dress was normal not over the top, just Riddhima in a sari and Vansh was in his daily clothes without beard(at that time I got used to without beard looks of Vihaan and started liking it too) and their performance was very intense.
3. Khamoshiya. I liked Khamoshiya song sequence on RiAnsh. There was different kind of khamoshi between them which was very intense.
4. Shayed. I liked Shayed song sequence on RiHaan. It was also very intense. Specially how Vansh wanted to feel Riddhima's touch.
5. Malang. I liked Malang song and dance sequence also. Helly is an amazing dancer and she did very well on that dance sequence as Riddhima.
6. Bol na halke halke. I liked Bol na halke halke song sequence also. Special mention about Riddhima's beautiful smile all the times in the song and her happiness. Still thinking it was a dream sequence or real because of the editor.
These are my favorite dance and song sequences on RiAnsh though I liked all the dance and song sequences on RiAnsh till now.