Most common site of brain metastasis is-
(Refer: Nelson’s Textbook of Pediatrics, SAE, 1st edition, pg no. 2460)
 

MC site of brain metastases (85%) CEREBRUM
2nd MC site of brain metastases- CEREBELLUM
LUNG, BREAST, MELANOMA (SKIN CANCER), COLON AND KIDNEY cancers commonly spread to the brain.
Cerebrum
Cerebellum
Medulla oblongata
Pons