this is some ways to find it:
How to Find a Song You Know Nothing About
Steps
There is always a chance that a friend will know the song you’re looking for, so try that first.
Next time you hear that song, make an effort to memorize a few lines. A chorus is good because there is a good chance that the song's title will be repeated several times in it. Hang around on that radio station for a few minutes, in case they announce the songs.
After that, go to Google, or your preferred search engine and typing in the word 'lyrics' followed by anything you do know about the song (such as the artist, album, or title if you know one of those) then finally type in the segment of lyrics you know. It can just be random words, or a sentence. If they're sequential, and especially if they are common words, put them in quotation marks ("") so you search on the whole phrase. Then search. Hopefully lyrics for your song will pop-up and it will include all the info you need.
Also, try SongTapper and tap in the rhythm of the song while singing it in your head. You might be able to find your song there.
Ask yourself if the song sounds familiar. Is the voice distinct? Could it be somebody you already listen to or like? If you think it sounds a lot like a singer or group you have heard, check that band's website or their fan sites to see if they have any new releases.
Try your radio station's website. Many stations these days post their playlists or at least their top songs. Some even list them by time played, within the past hour, day, or week.
Call the radio station (or other source of the song) and ask. It's best not to do this all the time, since otherwise they'd be flooded with calls, so try the other tactics first. Ask them to announce songs more often, especially new ones. It helps to call promptly, so that you don't have to sing them a half-remembered chorus and ask them to guess which song they might have played last Tuesday.
If you have a little sample of the song, you can try Tunatic.
Tips
Try to make the lyrics you type in distinct, and avoid common word such as the, and, or but, etc. Love songs are especially common, too, so if the song has a lot of common phrases in it ("I love you"), you may need to choose something else.
If you're getting a lot of stuff from your searches that have nothing to do with songs, for instance if searching on the phrase "hardware store" is getting you websites and locations of hardware stores and not the song "Hardware Store" either choose more specific phrases (such as "big purple sign out front") to search or add the word "lyrics" or "song" to your search, or both.
If you heard the song on a TV commercial, search on Google for "TV Commercial Songs" there are also external links at the bottom of this page. You can search for the company advertisement on which you heard the song.