QUICK - Seamless Song Section Replacement

I have a song track MP3. I need the middle portion of that MP3 track re-worked. From 4:41 to 6:30 the current song, “Rabta,” must be replaced with Bryan Adams’ “Everything I Do (I Do It for You).” The inserted section os the beginning of the Bryan Adams song and it has to run exactly 1 minute 49 seconds and sit so naturally that no one hears the join. A gentle fade-in at 4:41 and a fade-out at 6:30 are the only effects I want; keep the overall loudness and character identical to the surrounding audio.

I don’t yet have a clean MP3 of the Bryan Adams song, so part of the job is to obtain a high-quality copy in the same format before you begin editing.

Deliverables
• Final mixed MP3 in the same bitrate and metadata as the original
• A preview snippet of the transition for sign-off before delivering the master

Acceptance criteria: transition must be click-free, timing precise to 1:49, and loudness matched to within ±1 dB of the adjacent material.