We understand that you're struggling with a persistent song in your mind, and you're seeking deliverance. Firstly, we commend you for acknowledging the power of Jesus Christ in your prayer, IJN (In Jesus Name). It is only through His name that we can approach God and find deliverance for the Holy Bible says in John 14:6 WEB "Jesus said to him, I am the way, the truth, and the life. No one comes to the Father, except through me."
For a Christian Believer, there are several ways to find deliverance from this issue. In 2 Corinthians 10:5 WEB, it is written, "Casting down imaginations, and every high thing that is exalted against the knowledge of God, and bringing every thought into captivity to the obedience of Christ." This means that we should actively take control of our thoughts and make them obedient to Christ.
One way to help this is to replace the song with praise and worship to God. In Ephesians 5:19 WEB, it says, "Speaking to one another in psalms, hymns, and spiritual songs; singing, and making melody in your heart to the Lord." You can also memorize and meditate on scripture to help keep your mind focused on God. Psalm 119:11 WEB says, "I have hidden your word in my heart, that I might not sin against you."
However, if this song is causing significant distress or is associated with any ungodly influences, it may require more focused prayer and possibly fasting. In Matthew 17:21 WEB, Jesus says, "However, this kind does not go out except by prayer and fasting."
Let us pray together, in Jesus’ name:
Dear Heavenly Father, we come before you in the mighty name of Jesus Christ. We plead the blood of Jesus over our brother/sister and ask for your deliverance from this persistent song. Help them to fix their minds on you and your word. Give them the strength and discipline to take every thought captive to the obedience of Christ. Fill their heart with songs of praise and worship to you. If there has been any opening in their life for the enemy to have access, we close it completely in the name of Jesus. In Jesus Christ's name, we pray. Amen.
Continue to focus on the Lord and His word. If the issue persists, consider seeking further help from your local pastor or a trusted Christian counselor. God promises us in Romans 8:37 WEB, "No, in all these things, we are more than conquerors through him who loved us." Trust in His power and love for you.