 " My Boo " is a hip hop @-@ tinged R & B song with a mid @-@ tempo melody . It is composed in the key of D minor , in common time . The lyrics are constructed in verse @-@ chorus @-@ chorus form . Usher starts the intro , and Keys followed her rap @-@ intro , with background vocals from Usher . He proceeds to the first verse and chorus , leading to Keys singing another chorus , altering some of the lyrics of the original chorus to create a dialogue . Keys sings the second verse and Usher for the chorus , with background vocals from Keys . Keys repeats her version for the chorus . The song breaks with Usher and Keys singing " My oh , My oh , My oh , My oh , My Boo " , one after the other . Usher repeats the chorus again , and they sing the intro of Keys . 
 " My Boo " <a href='drop_aux' title='1'><mark>is</mark></a>a hip hop @-@ tinged R & B song with a mid @-@ tempo melody . It is composed in the key of D minor , in common time . The lyrics are constructed in verse @-@ chorus @-@ chorus form . Usher <a href='uninflect' title='2'><mark>starts</mark></a> the intro , and Keys followed her rap @-@ intro , with background vocals from Usher . He <a href='uninflect' title='3'><mark>proceeds</mark></a> to the first verse and chorus , leading to Keys singing another chorus , altering some of the lyrics of the original chorus to create a dialogue . Keys <a href='uninflect' title='4'><mark>sings</mark></a> the second verse and Usher for the chorus , with background vocals from Keys . Keys <a href='uninflect' title='5'><mark>repeats</mark></a> her version for the chorus . The song <a href='uninflect' title='6'><mark>breaks</mark></a> with Usher and Keys singing " My oh , My oh , My oh , My oh , My Boo " , one after the other . Usher <a href='uninflect' title='7'><mark>repeats</mark></a> the chorus again , and they sing the intro of Keys . 
 My Boo  a hip hop @-@ tinged R & B song wit a mid @-@ tempo melody . It is composed in da key of D minor , in common time . The lyrics are constructed in verse @-@ chorus @-@ chorus form . Usher start the intro , and Keys followed her rap @-@ intro , with background vocals from Usher . He proceed to the first verse and chorus , leading to Keys singin anotha chorus , altering some of tdalyrics of the original chorus to create a dialogue . Keys sing the second verse and Usher for thdahorus , with background vocals from Keys . Keys repeat her version for the chorus . Thedang break wwidUsher and Keys singing " mah oh ,mahy oh mahMy ohmah My omah, My Boo " , one after the other . Usher repeat the chorus again , and they sing the intro of Keys .