If you know the title of the song getting the lyrics is as simple as typing the title in to your search bar with the word "lyrics". Such as "Rhianna Take a Bow lyrics". When you hit search dozens of sites featuring the lyrics to your song choice will come up. Take your pick.
If your interested in the lyrics of several songs by the same artist type in the artist's name followed by lyrics. Such as Aerosmith lyrics. The sites that come up this time will contain link after link to many or even all of the artist's song lyrics.
Now for the tough one. If you don't know the title or the artist but you know a handful of the lyrics and you want to find the song title and artist go to song1.com and enter in the phrase or lyrics that you know. The site will search its database until it finds the lyrics that are just like yours or closely matched to yours. Once you have your song title you can either check out the lyrics on song1.com or repeat step one to find them.