Surprised this hasn't been done before.

YouTube Upload: https://youtu.be/8w3LCoY1iIw (watch till the end for something important)

Sources:
Hyper Potions - Friends
Bring Me The Horizon - Can You Feel My Heart

Image Sources:
https://www.deviantart.com/diegoshedyk53182/art/Sonic-Mania-Wallpaper-Just-Background-701647245
https://www.reddit.com/r/SonicTheHedgehog/comments/10nx4c7/sonic_giga_chad_for_anyone_who_wants_it/

Can You Feel My Friends' Hearts

im not the first one who came up with this 2

im not the first one who came up with this 4

Can You Get Me Much Higher

i'm just gonna let the thumbnail speak for itself

same key and 3 bpm apart

This jazzy, upbeat track is not only soulful, but it's also  fused with trance and pop elements.

Bandcamp

The Chakra Song

THIS TOOK WAY MORE EFFORT THAN IT'S WORTH

You May Find Yourself Living In

This was by far one of the easiest mashups Ive ever made. Both the Acapella and Instrumental were readily available in crystal clear quality with the exact same BPM and a semitone of difference in key

Aaron Smith - Dancin (KRONO Remix)
Ke$ha - Blow

Dancin Blow

I'D RATHER BE LISTENING TO THE GRAMMY AWARD-WINNING 1999 HIT SMOOTH BY SANTANA FEAT. ROB THOMAS OF MATCHBOX TWENTY OFF THE MULTI-PLATINUM ALBUM SUPERNATURAL

Smooth Lights

I hope my college friends don't find this account. 

Go follow my second account below for more mashups

same key and 3 bpm apart

nigelodeon (OUT OF MINUTES)