Apple has excluded Lyrics feature from iPad Music app for unknown reasons but its still available for iPhone or iPod Touch users. So iPad owners who wish to display Lyrics metadata back must give a try to Lyrics Cydia tweak that enables Lyrics in native Music app for iPad.
Just visit BigBoss repository on Cydia to download Lyrics for iPad which is available free and install it. Lyrics for iPad is compatible with iOS 5.0 or later.
Nice to get back Lyrics on iPad music application, but just for jailbroken.