Up down's paradox

[Verse] A happiness La la la la A sadness La la la la My heart It goes up and down Like a rollercoaster spinning round A high A laughter So carefree But then it crashes Oh so painfully Feelings They come and they go Like a never-ending show [Verse 2] A sunshine La la la la A raincloud La la la la One moment Skies are blue and bright But then they turn to gray Overnight [Verse] In this world Full of joy and surprise La la la la Watch it rise No matter the weather We'll dance all night La la la la Feels so right [Verse 2] From the moment we wake 'til the stars in the sky La la la la We'll reach so high With a skip in our step And a smile so wide La la la la Let it inside [Chorus] Happiness La la la la Spreading love Near and far Happiness La la la la Shining brightly Like a star