What lullabies can I sing to my girlfriend?

she really like my voice, hehe. she said she when she hear my voice, i made her more inlove to me.
i seranaded her when i was confessed my feeling and said i loved her so much, during the Valentine's day this year. icomposed the song my self. hehe she really loves me, specially when i sang a song to her. so please give me song ideas to sing some love song or lullabies to her hehe.
thanks in advance.
What lullabies can I sing to my girlfriend?
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