As singers, our whole body is the instrument. And as with any physical instrument, the first thing we have to do is learn how to hold it.
Proper skeletal alignment is KEY to playing the voice. But tight hip flexors could be throwing the whole thing off. Try a lunge to lengthen your hip flexors, bring the pelvis into neutral, and the whole spine back into alignment.
Curious about other ways to stretch your hips and find better alignment? Check out Yoga for Singers ONLINE.