SB 10.29.44

upagīyamāna udgāyan
 vanitā-śata-yūthapaḥ
mālāṁ bibhrad vaijayantīṁ
 vyacaran maṇḍayan vanam
Synonyms: 
upagīyamānaḥ — being sung about; udgāyan — singing loudly Himself; vanitā — of women; śata — hundreds; yūthapaḥ — the commander; māIām — the garland; bibhrat — wearing; vaijayantīm — known as Vaijayantī (which consists of flowers of five different colors); vyacaran — moving about; maṇḍayan — beautifying; vanam — the forest.
Translation: 
As the gopīs sang His praises, that leader of hundreds of women sang loudly in reply. He moved among them, wearing His Vaijayantī garland, beautifying the Vṛndāvana forest.
Purport: 

According to Śrīla Jīva Gosvāmī, Lord Kṛṣṇa sang many wonderful melodies and meters, and the gopīs accompanied Him, following His lead. Kṛṣṇa’s singing on this occasion is described in the Śrī Viṣṇu Purāṇa:

kṛṣṇaḥ śarac-candramasaṁ
 kaumudīṁ kumudākaram
jagau gopī-janas tv ekaṁ
 kṛṣṇa-nāma punaḥ punaḥ

“Kṛṣṇa sang the glories of the autumn moon, the moonshine and the lotus-filled river, while the gopīs simply sang His name repeatedly.”