Barsanewali Radha Rani

Radhe Radhe Kahat hee, sab Biyadha mitjay
koti janm kee aapada, shri Radhe kahe se kat jay

Srimati Radharani is the direct counterpart of Lordi Krishna. She is the central figure for all the goddesses of fortune. She possesses all the attractiveness to attract the all-attractive Personality of Godhead. She is the primeval internal potency of the Lord . 

She is the chief associate and devotee of Lord Krishna, and topmost of all goddesses Srimati Radharani is the Supreme Goddess. She is most always seen with Krishna. She is the most excellent worshiper of Lord Krishna. However, She is also an expansion of the Lord's energy. Since She is also an extension of Krishna, She is the feminine aspect of God.

Radharani has many names according to Her qualities and characteristics :

GKrishnamayi
Govinda-mohini
Govinda-sarvasa
Govinda-anandini
Shiromani Sarva-kanta

Radha Rani is also known as Sarva-kanti , which indicates that all beauty and luster rest in Her body, and all the Lakshmis derive their beauty from Her. Sarva-kanti also means that all the desires of Lord Krishna rest in Srimati Radharani. As Lord Krishna enchants the world with His beauty and charm, Sri Radha enchants Him. 

Therefore She is the Supreme Goddess. Sri Radha is the full power, and Lord Krishna is the possessor of full power. Thus, the two are non-different, as the sunshine is nondifferent from the sun, or as the energy is non-different from the energetic or source of energy.

Radhe tu bad bhagini, Kyon tapsya keen
tenn lok taran tarad ,tere hee Adheen

Without Radha Rani there is no meaning to loard Krishna and without Krishna there is no meaning to Radha Rani. Because of this, in the Vaishnava tradition we always pay respects first to the Lord's internal energy in the form of Radha Rani, and then to the Lord Krishna. 

Thus They are referred to as Radha-Krishna, or in other names as Sita-Rama, Lakshmi-Narayana, and so on. In this way, Radha and Krishna are one, but when Lord Krishna wants to enjoy, He manifests Himself as Radharani. Otherwise, there is no energy in which Krishna can attain pleasure outside Himself.