Birthday Party Tech Deck I Will Be DJing For My Grandmother's 70th Birthday Party The Cheap Way. Suggestions?

I will be DJing for my grandmother's 70th birthday party the cheap way. suggestions? - birthday party tech deck

I will use my laptop to my stereo and speakers.

Proposals for software or something else?
they would like karaoke, but have the words, software / suggestions for this?

Chat family integrates techie fanatic and I want to love the technology in this game as possible!

Thank you for help.