I would think LIp Syncing while strumming on an Air Lute would be appropriate for Silence.

And while I might be showing my age, Speak to Animals and Animal Friendship could be the classic Disney live-action Dr Doolittle "Talk to the Animals." 

Quote from Dilope97 >>

Kickstart my (your) heart when you heal someone thats unconcious

 yes lol

Hero's feast: have a drink on me - ACDC

Any spell that goes boom: T.N.T. - ACDC

Charm Person (Specifically when used on a person of the opposite gender): Angel - Aerosmith

be back with more later

All My Fellas, as friends :D

Charm Person - This Charming Man by The Smiths

Heroism - Hero by Nickleback / There Goes My Hero by The Foo Foo Fighters

Song of Rest - At the End of the Day by Wallows

Faerie Fire - Shine by Collective Soul

Does anyone have good songs for eldritch blast?  I play a bard warlock and want a line to sing for every spell.  

Darkness - Hello Darkness my old friend.

Silence - The sound, of silence. 

My wife has her own list of songs, and insults for Vicious Mockery.

Quote from Respawning >>

Does anyone have good songs for eldritch blast?  I play a bard warlock and want a line to sing for every spell.  

Quote from Respawning >>

Does anyone have good songs for eldritch blast?  I play a bard warlock and want a line to sing for every spell.  

AC/DC -

Ain't got no gun, ain't got no knife
Don't you start no fight
'Cause I'm T.N.T., I'm dynamite
T.N.T., and I'll win the fight
T.N.T., I'm a power load
T.N.T., watch me explode

I will edit this as I come up with more ideas

1. Literally any spell related to electricity: Thunderstruck (by AC/DC) 

2. Dissonant Whispers: Never Gonna Give You Up (Rick Astley) or Baby Shark or Pink Fluffy Unicorns dancing on rainbows

And of course, 

3. Fireball (and related spells): Girl on fire (Alicia Keyes), Firework (Katy Perry), Insane (Black Gryph0n & Baasik) 

4. Disguise self: Poker Face (Lady Gaga), Fake *ss friends (Set It Off) “show them what they want/social camouflage/mirror everyone in sight/such a charming way to lie!”

5. Maybe a silencing spell?: Snake Charmer (Autumn kings) 

6. Dancing Lights: Fireflies (Owl City)

Bonus

Any spell against a cocky opponent: Dark Horse (Katy Perry), Little Girl Gone (CHINCHILLA), Confident (Demi Lovato)

Detect Magic: It‘s a kind of magic (Queen)

Friends: Friends will be friends (Queen)

Unseen Servant: Invisible man (Queen)

Power word kill: Anotherone bites the dust, Who wants to live forever? (Queen)

Crown of madness: I am going slightly mad (Queen)

Cure wounds: Keeps yourself alive (Queen)

Resurrection: Resurrection (Brian May)

Heroism: Don’t stop me now (Queen)

Wish: The miracle (Queen)

True seeing: One vision (Queen)

Faire fire: My fairy king (Queen)

Calm emotions: Let it be (Beatles)

Aid: Help!!! (Beatles)

Leomund‘s tiny hat: Yellow submarine (Beatles)

Quote from Soapbunny >>

Hey I'm making a giant spreadsheet of songs that can be used as bard spells!

here is the link! Feel free to add as much as you'd like just do not delete anything! <3

 https://docs.google.com/spreadsheets/d/1LlkC0J1o9Dm1htpT74yTXp61_QrvLIal3Hv-uTupGA8/edit?usp=sharing

if you dont want to use the google doc feel free to post here and I'll add it to the spreadsheet!